chore(deps): update actions/setup-python action to v2 (#1303)

Author: renovate-bot

.github/workflows/main.yml

@@ -40,7 +40,7 @@ jobs:
           git checkout -b update-discovery-artifacts-${{ steps.date.outputs.current_date }}
 
       - name: Set up Python 3.9
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v2
         with:
           python-version: 3.9