[Squash] Apply suggestions from code review

Author: jasnell

doc/api/async_context.md

@@ -467,7 +467,7 @@ added:
   - v12.19.0
 changes:
   - version: REPLACEME
-    pr-url: https://github.com/nodejs/node/pull/00000
+    pr-url: https://github.com/nodejs/node/pull/46432
     description: The `asyncResource` property added to the bound function
                  has been deprecated and will be removed in a future
                  version.
@@ -497,7 +497,7 @@ added:
   - v12.19.0
 changes:
   - version: REPLACEME
-    pr-url: https://github.com/nodejs/node/pull/00000
+    pr-url: https://github.com/nodejs/node/pull/46432
     description: The `asyncResource` property added to the bound function
                  has been deprecated and will be removed in a future
                  version.

doc/api/deprecations.md

@@ -3344,7 +3344,7 @@ In a future version of Node.js, [`message.headers`][],
 <!-- YAML
 changes:
   - version: REPLACEME
-    pr-url: https://github.com/nodejs/node/pull/00000
+    pr-url: https://github.com/nodejs/node/pull/46432
     description: Runtime-deprecation.
 -->