ci: update workflow-template

Add filter to eventsource

Filter events to only trigger on pushes to the
`{{ $app.github.branch }}` branch.

Author: in-jun

chart/templates/app/ci/eventsource.yaml

@@ -28,6 +28,11 @@ spec:
       events:
         - push
         - delete
+      filter:
+        data:
+          - path: "ref"
+            type: "string"
+            value: "refs/heads/{{ $app.github.branch }}"
       apiToken:
         name: {{ $.Values.project }}-github-access-secret
         key: token