Fix yaml in changelog

changelogs/fragments/allow-fail-json-msg-to-be-positional.yaml

@@ -1,5 +1,5 @@
 minor_features:
-  - `AnsibleModule.fail_json()` has always required that a message be passed
+  - "`AnsibleModule.fail_json()` has always required that a message be passed
     in which informs the end user why the module failed.  In the past this
     message had to be passed as the `msg` keyword argument but it can now be
-    passed as the first positional argument instead.
+    passed as the first positional argument instead."