Fix announce job

.github/workflows/publish_snapshot_ports.yml

@@ -154,7 +154,17 @@ jobs:
     needs: [wurst, wi_zoom, mo_glass]
     if: ${{ !failure() && !cancelled() && inputs.announce }}
     steps:
-    - name: Announce snapshot ports
+    - name: Checkout repository
+      uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.12"
+        cache: "pip"
+        cache-dependency-path: scripts/requirements.txt
+    - name: Install dependencies
+      run: pip install -r scripts/requirements.txt
+    - name: Run announce_snapshot_ports.py
       run: |
         python3 scripts/announce_snapshot_ports.py \
           ${{ github.event.inputs.snapshot }} \