address feedback pohly

Author: kannon92

contributors/guide/pull-requests.md

@@ -603,7 +603,7 @@ at once to that file.
 Some tools make it very easy to create large and/or automatic Pull Requests, for example:
 - global search/replace
 - linters which automatically correct issues (see also next section)
-- AI tools (Large language models, AI assistants, etc) which generate code or documentation
+- AI tools (large language models, assistants, etc) which generate code or documentation
 
 To make it easier for reviewers to handle such Pull Requests, please explain
 how it was generated in the "Special notes for your reviewer" section of the
@@ -626,7 +626,7 @@ the Pull Request provides.
 ## AI Guidance
 
 Please understand that any Pull requests you are the author and the expectation is that you understand the details of your pull request.
-If an author can't explain why a AI tool made that change, the PR will be closed.
+If an author can't explain why an AI tool made that change, the PR will be closed.
 
 Please always respond to review comments without using an AI tool.