Move manifest-creation CI to python3.11

Author: tcompa

.github/workflows/manifest_external_packages.yml

@@ -78,7 +78,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version: '3.11'
           cache: 'pip'
 
       - name: Update pip