chore: add notification step to release

.github/workflows/release_gem.yml

@@ -7,7 +7,7 @@ on:
       - release-triggered
 
 jobs:
-  build:
+  release:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -18,3 +18,23 @@ jobs:
           GEM_HOST_API_KEY: "${{ secrets.RUBYGEMS_API_KEY }}"
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
           INCREMENT: "${{ github.event.client_payload.increment }}"
+
+notify-gem-released:
+  needs: release
+  strategy:
+    matrix:
+      repository: [pact-foundation/pact-ruby-cli, pact-foundation/pact-ruby-standalone]
+  runs-on: ubuntu-latest
+  steps:
+    - name: Notify ${{ matrix.repository }} of gem release
+      uses: peter-evans/repository-dispatch@v1
+      with:
+        token: ${{ secrets.GHTOKENFORPACTCLIRELEASE }}
+        repository: ${{ matrix.repository }}
+        event-type: gem-released
+        client-payload: |
+            {
+              "name": "${{ needs.release.outputs.gem_name }}",
+              "version": "${{ needs.release.outputs.version }}",
+              "increment": "${{ needs.release.outputs.increment }}"
+            }