improve documentation for github_repository (#2265)

Co-authored-by: Nick Floyd <[email protected]>

website/docs/r/repository.html.markdown

@@ -10,9 +10,11 @@ description: |-
 This resource allows you to create and manage repositories within your
 GitHub organization or personal account.
 
-~> Note: When used with GitHub App authentication, even GET requests must have
-the `contents:write` permission or else the `allow_merge_commit`, `allow_rebase_merge`,
-and `allow_squash_merge` attributes will be ignored, causing confusing diffs.
+~> Note: When used with GitHub App authentication, even GET requests must have the `contents:write` permission. Without it, the following attributes will be ignored, leading to unexpected behavior and confusing diffs:
+
+- `allow_merge_commit` (including the related `merge_commit_title` and `merge_commit_message`)
+- `allow_squash_merge` (including the related `squash_merge_commit_title` and `squash_merge_commit_message`)
+- `allow_rebase_merge`
 
 ## Example Usage