revert git workflow change

Author: tarun-google

.github/workflows/update_python_dependencies.yml

@@ -78,6 +78,14 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GH_EVENT: ${{ github.event_name }}
         run: |
+          # Take the current date, subtract from a release cut date in the past (Mar 6, 2024),
+          # then get the num days % 42 (our release cadence is 42 days).
+          # This will ensure it only runs the week after a release branch has been cut.
+          days_diff=$(( ($(date +%s) - $(date --date="240306" +%s) )/(60*60*24)%42 ))
+          if [[ $GH_EVENT != 'workflow_dispatch' && $days_diff -gt 6 ]]; then
+            echo "Exiting early. We only update dependencies the week after we cut the release"
+            exit 0
+          fi
           branchName=weekly_update_python_dependencies_$(date +%s)
           git checkout -b $branchName
           git add -A