CLOUDP-84607: Add trigger for helm charts (#792)

Author: Sugar-pack

.github/workflows/release-post-merge.yml

@@ -45,6 +45,16 @@ jobs:
           echo "version=$version" >> $GITHUB_OUTPUT
           echo "tag=$tag" >> $GITHUB_OUTPUT
 
+      - name: Trigger helm post release workflow
+        run: |
+          curl \
+            -X POST \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ secrets.HELM_REPO_TOKEN }}"\
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/mongodb/helm-charts/actions/workflows/post-atlas-operator-release.yaml/dispatches \
+            -d '{"ref":"main","inputs":{"version":"'"${{ steps.tag.outputs.version }}"'"}}'
+
       - name: Check out code into the Go module directory
         uses: actions/checkout@v3.1.0
         with: