Unescape HTML-escaped apostrophes in regression test artefacts

Since #2098 & #2112, apostrophes rendered via `SmartAnswer::ErbRenderer` have
not been HTML-escaped. Now that we are rendering question content via this
renderer, we need to update the regression test artefacts for question pages
accordingly.

I ran the following commands to do this:

    $ find test/artefacts/childcare-costs-for-tax-credits -name '*.html' | xargs sed -i .bak "s/'/'/g"
    $ git clean -fd test/artefacts/childcare-costs-for-tax-credits/**/*.bak

Author: floehopper

test/artefacts/childcare-costs-for-tax-credits/no.html

@@ -50,7 +50,7 @@ <h2>
     <li>
         <label for="response_1" class="selectable">
           <input type="radio" name="response" id="response_1" value="regularly_more_than_year" />
-          I&#39;ve been using childcare regularly for a year or more
+          I've been using childcare regularly for a year or more
         </label>
     </li>
     <li>

test/artefacts/childcare-costs-for-tax-credits/no/regularly_more_than_year.html

@@ -99,7 +99,7 @@ <h3 class="previous-answers-title">
     <tr class="section">
     <td class="previous-question-title">How often do you use childcare?</td>
       <td class="previous-question-body">
-      I&#39;ve been using childcare regularly for a year or more</td>
+      I've been using childcare regularly for a year or more</td>
 
       <td class="link-right">
           <a href="/childcare-costs-for-tax-credits/y/no?previous_response=regularly_more_than_year">

test/artefacts/childcare-costs-for-tax-credits/no/regularly_more_than_year/no.html

@@ -81,7 +81,7 @@ <h3 class="previous-answers-title">
     <tr class="section">
     <td class="previous-question-title">How often do you use childcare?</td>
       <td class="previous-question-body">
-      I&#39;ve been using childcare regularly for a year or more</td>
+      I've been using childcare regularly for a year or more</td>
 
       <td class="link-right">
           <a href="/childcare-costs-for-tax-credits/y/no?previous_response=regularly_more_than_year">

test/artefacts/childcare-costs-for-tax-credits/no/regularly_more_than_year/yes.html

@@ -123,7 +123,7 @@ <h3 class="previous-answers-title">
     <tr class="section">
     <td class="previous-question-title">How often do you use childcare?</td>
       <td class="previous-question-body">
-      I&#39;ve been using childcare regularly for a year or more</td>
+      I've been using childcare regularly for a year or more</td>
 
       <td class="link-right">
           <a href="/childcare-costs-for-tax-credits/y/no?previous_response=regularly_more_than_year">

test/artefacts/childcare-costs-for-tax-credits/no/regularly_more_than_year/yes/every_4_weeks.html

@@ -80,7 +80,7 @@ <h3 class="previous-answers-title">
     <tr class="section">
     <td class="previous-question-title">How often do you use childcare?</td>
       <td class="previous-question-body">
-      I&#39;ve been using childcare regularly for a year or more</td>
+      I've been using childcare regularly for a year or more</td>
 
       <td class="link-right">
           <a href="/childcare-costs-for-tax-credits/y/no?previous_response=regularly_more_than_year">

test/artefacts/childcare-costs-for-tax-credits/no/regularly_more_than_year/yes/fortnightly.html

@@ -80,7 +80,7 @@ <h3 class="previous-answers-title">
     <tr class="section">
     <td class="previous-question-title">How often do you use childcare?</td>
       <td class="previous-question-body">
-      I&#39;ve been using childcare regularly for a year or more</td>
+      I've been using childcare regularly for a year or more</td>
 
       <td class="link-right">
           <a href="/childcare-costs-for-tax-credits/y/no?previous_response=regularly_more_than_year">

test/artefacts/childcare-costs-for-tax-credits/no/regularly_more_than_year/yes/yearly.html

@@ -80,7 +80,7 @@ <h3 class="previous-answers-title">
     <tr class="section">
     <td class="previous-question-title">How often do you use childcare?</td>
       <td class="previous-question-body">
-      I&#39;ve been using childcare regularly for a year or more</td>
+      I've been using childcare regularly for a year or more</td>
 
       <td class="link-right">
           <a href="/childcare-costs-for-tax-credits/y/no?previous_response=regularly_more_than_year">

test/artefacts/childcare-costs-for-tax-credits/yes/yes/monthly_same_amount.html

@@ -32,7 +32,7 @@ <h1>
         <div class="current-question" id="current-question">
             <div class="question">
   <h2>
-    What&#39;s the new monthly cost of your childcare?
+    What's the new monthly cost of your childcare?
   </h2>
   <div class="question-body">
 

test/artefacts/childcare-costs-for-tax-credits/yes/yes/monthly_same_amount/43.3.html

@@ -105,13 +105,13 @@ <h3 class="previous-answers-title">
 
 
     <tr class="section">
-    <td class="previous-question-title">What&#39;s the new monthly cost of your childcare?</td>
+    <td class="previous-question-title">What's the new monthly cost of your childcare?</td>
       <td class="previous-question-body">
       £43.30</td>
 
       <td class="link-right">
           <a href="/childcare-costs-for-tax-credits/y/yes/yes/monthly_same_amount?previous_response=43.3">
-            Change<span class="visuallyhidden"> answer to "What&#39;s the new monthly cost of your childcare?"</span>
+            Change<span class="visuallyhidden"> answer to "What's the new monthly cost of your childcare?"</span>
 </a>      </td>
   </tr>