Update generate.yaml

Author: ldetmer

.github/workflows/generate.yaml

@@ -32,11 +32,9 @@ jobs:
           repository: googleapis/discovery-artifact-manager
           fetch-depth: 1
           path: discovery-artifact-manager
-      - uses: actions/setup-python@v5
-        with:
-          python-version: 3.6
       - run: |
           sudo apt update
+          sudo install python3
           python3 --version
           pip --version  
       - run: ./google-api-java-client-services/.github/workflows/generate.sh ${{ matrix.service }}