📝 Fix misspelling & missing punctuation mark in Pull Request Handbook Documentation. (#36709)

Author: chelmerrox

docs/contributing-to-airbyte/resources/pull-requests-handbook.md

@@ -18,7 +18,7 @@ For more information about [breaking changes](#breaking-changes-to-connectors).
 
 Any refactors, cleanups, etc.. that are not visible improvements to the user should not have emojis.
 
-If you're code change is doing more than one change type at once we strongly recommend to break into multiple pull requests. It helps us to review and merge your contribution.
+If your code change is doing more than one change type at once, we strongly recommend to break into multiple pull requests. It helps us to review and merge your contribution.
 
 ## Descriptions