Fix publish-test.yml: Update Python 3.9 -> 3.10

Poetry 2.3.2 installation fails with Python 3.9:
  Installing Poetry (2.3.2): An error occurred.

Other workflows use Python 3.10 and work fine. Updating to match
ensures consistency and avoids Poetry installation issues.

Signed-off-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: msrathore-db

.github/workflows/publish-test.yml

@@ -14,7 +14,7 @@ jobs:
         id: setup-python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: "3.10"
       #----------------------------------------------
       #  -----  install system dependencies  -----
       #----------------------------------------------