[B-1366] Add GH action to trigger mpc-uniqueness-check-deploy

.github/workflows/update-deployment.yaml

@@ -0,0 +1,23 @@
+name: Update deployment ref number
+
+on: [push]
+
+jobs:
+  update-deployment:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Repository Dispatch
+        uses: peter-evans/repository-dispatch@v2
+        with:
+          token: ${{ secrets.GIT_HUB_TOKEN }}
+          repository: worldcoin/mpc-uniqueness-check-deploy
+          event-type: update-ref
+          client-payload: |
+            {
+              "sha": "${{ github.sha }}",
+              "ref": "${{ github.ref }}",
+              "ref_name": "${{ github.ref_name }}",
+              "ref_type": "${{ github.ref_type }}",
+              "repository": "${{ github.repository }}"
+            }