[chore] Fix the update-otel job

.github/workflows/update-otel.yaml

@@ -1,6 +1,11 @@
 name: 'Update contrib to the latest core source'
 on:
   workflow_dispatch:
+  # TODO: Remove before merging.
+  pull_request:
+    types: [ opened, synchronize, reopened, labeled, unlabeled ]
+    branches:
+      - main
   # TODO: Enable schedule once it's verified that the action works as expected.
   #  schedule:
   #    - cron: "27 21 * * *" # Run at an arbitrary time on weekdays.
@@ -18,21 +23,16 @@ jobs:
         with:
           path: opentelemetry-collector
           repository: open-telemetry/opentelemetry-collector
-      - name: Update to latest opentelemetry-collector release
+      - name: Update to latest opentelemetry-collector release and push
         run: |
           cd opentelemetry-collector-contrib
           git config user.name opentelemetrybot
           git config user.email [email protected]
           make genotelcontribcol
           make update-otel
-      - name: Create pull request against main
-        uses: peter-evans/create-pull-request@v7
-        with:
-          branch: opentelemetrybot/update-otel
-          path: opentelemetry-collector-contrib
-          base: main
-          token: ${{ secrets.OPENTELEMETRYBOT_GITHUB_TOKEN }}
-          commit-message: "[chore] Update to latest opentelemetry-collector release"
-          title: "[chore] Update to latest opentelemetry-collector"
-          body: |
-              This PR updates the opentelemetry-collector dependency to the latest release.
+          git add .
+          git commit -m "[chore] Update to latest opentelemetry-collector release"
+          git push origin "opentelemetrybot/update-otel-$(date +%s)"  
+          gh pr create --title "[chore] Prepare release ${CANDIDATE_BETA}" --body "This PR updates the opentelemetry-collector dependency to the latest release"
+        env:
+          GITHUB_TOKEN: ${{ secrets.OPENTELEMETRYBOT_GITHUB_TOKEN }}