[stable-2.16] release.py - Include pyproject.toml in git add (#83892) (#83898)

(cherry picked from commit e3ccdaaa2e)

packaging/release.py

@@ -1324,6 +1324,7 @@ def create_release_pr(allow_stale: bool = False) -> None:
         add=(
             CHANGELOGS_DIR,
             ANSIBLE_RELEASE_FILE,
+            ANSIBLE_PYPROJECT_TOML_FILE,
         ),
         allow_stale=allow_stale,
     )