ci: use python 3.11 to determine updated packages in PR description (#…

…1160)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Chores**
- Updated the script to compare package requirements against
`constraints_py3.11.txt` instead of `constraints_py3.9.txt`.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

build_utils/check_updated_packages.py

@@ -17,7 +17,7 @@
 args = parser.parse_args()
 
 out = subprocess.run(  # nosec
-    ["git", "diff", str(src_dir / "requirements" / "constraints_py3.9.txt")],
+    ["git", "diff", str(src_dir / "requirements" / "constraints_py3.11.txt")],
     capture_output=True,
     check=True,
     shell=False,