ci: pin python version for the translations (#13130)

The commit pins the version of Python used by the automatic translations
workflow which would otherwise fail with `node-gyp` errors.

Signed-off-by: vince-fugnitto <vincent.fugnitto@ericsson.com>

.github/workflows/translation.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Use Python 3.x
         uses: actions/setup-python@v4
         with:
-          python-version: "3.x"
+          python-version: "3.11"
 
       - name: Install and Build
         shell: bash