Update PR template to mention caveats to automatically generated comment (#36802)

.github/PULL_REQUEST_TEMPLATE.md

@@ -16,5 +16,7 @@ If you made changes to the `content` directory, a table will populate in a comme
 
 ### Check off the following:
 
-- [ ] I have reviewed my changes in staging (look for the "Automatically generated comment" and click the links in the "Preview" column to view your latest changes).
+- [ ] I have reviewed my changes in staging, available via the **View deployment** link in this PR's timeline.
+
+  - For content changes, you will also see an automatically generated comment with links directly to pages you've modified. The comment won't appear if your PR only edits files in the `data` directory.
 - [ ] For content changes, I have completed the [self-review checklist](https://github.com/github/docs/blob/main/contributing/self-review.md#self-review).