Downgrade Python to 3.12.9 again

This changeset puts us back to Python 3.12.9 since we are still wrestling with certificate validation errors in Python 3.13 and no easy way to test things without breaking our deployment flow currently.

Signed-off-by: Carlo Costino <carlo.costino@gsa.gov>

.github/actions/setup-project/action.yml

@@ -9,10 +9,10 @@ runs:
         sudo apt-get update \
         && sudo apt-get install -y --no-install-recommends \
         libcurl4-openssl-dev
-    - name: Set up Python 3.13.2
+    - name: Set up Python 3.12.9
       uses: actions/setup-python@v4
       with:
-        python-version: "3.13.2"
+        python-version: "3.12.9"
     - name: Install poetry
       shell: bash
       run: pip install poetry==2.1.3