chore: update auto comment msg (#37485)

.github/workflows/require_issue_link.yml

@@ -393,9 +393,9 @@ jobs:
                 marker,
                 '**This PR has been automatically closed** because you are not assigned to the linked issue.',
                 '',
-                'External contributors must be assigned to an issue before opening a PR for it. Please:',
-                '1. Comment on the linked issue to request assignment from a maintainer',
-                '2. Once assigned, your PR will be reopened automatically',
+                'Opening a PR is **not** an indication that it will be accepted. This process exists so maintainers can confirm a change is aligned with the project direction *before* you invest time implementing it. Please:',
+                '1. Comment on the linked issue explaining the approach you would like to take and why — include enough detail for a maintainer to evaluate the design. Do **not** post a drive-by "please assign me" comment with no substance; those will be ignored.',
+                '2. Wait for a maintainer to assign you. Once assigned, your PR will be reopened automatically.',
                 '',
                 '*Maintainers: reopen this PR or remove the `missing-issue-link` label to bypass this check.*',
               ];