Merge pull request #4066 from alphagov/dependabot/bundler/govuk_app_config-1.20.1

Author: thomasleese

Gemfile.lock

@@ -109,7 +109,7 @@ GEM
       rubocop-rails (~> 2)
       rubocop-rspec (~> 1.28)
       scss_lint
-    govuk_app_config (1.20.0)
+    govuk_app_config (1.20.1)
       aws-xray-sdk (~> 0.10.0)
       logstasher (>= 1.2.2, < 1.4.0)
       sentry-raven (>= 2.7.1, < 2.10.0)