Update peter-evans/repository-dispatch to v3

Author: Fryguy

.github/workflows/ci.yaml

@@ -34,7 +34,7 @@ jobs:
           regex: 'Merge pull request #(\d+)'
       - name: Notify manageiq.github.io on Push
         if: ${{ github.event_name == 'push' && github.repository_owner == 'ManageIQ' }}
-        uses: peter-evans/repository-dispatch@v2
+        uses: peter-evans/repository-dispatch@v3
         with:
           token: ${{ secrets.WEBSITE_DEPLOY_TOKEN }}
           repository: ManageIQ/manageiq.github.io