chore: improve label actions comments

.github/label-actions.yml

@@ -1,13 +1,12 @@
-test:
-  comment: >
-    Test comment
 'reproduction:required':
   comment: >
-    This issue has been labeled as requiring a reproduction, usually because implementation won't be possible without it.
+    This issue needs to be reproduced in order to continue.
 
     Please consult our guide on [minimal reproductions](https://github.com/renovatebot/renovate/blob/master/docs/development/minimal-reproductions.md) to understand what is needed.
 'reproduction:provided':
+
+    Issues requiring reproductions may be closed if no reproduction can be provided within two weeks.
   comment: >
-    Thank you for providing a reproduction.
+    Thank you for providing a reproduction for this issue.
 
     The label will be updated to `reproduction:confirmed` once someone else has confirmed they can reproduce the problem with it.