chore: add condition for docs publish (aquasecurity#1654)

Signed-off-by: chenk <[email protected]>

.github/workflows/publish-helm-chart.yaml

@@ -75,7 +75,7 @@ jobs:
           echo "::set-output name=tag::$latest_tag"
 
       - name: Repository Dispatch Publish docs
-        if: github.event.client_payload.action == 'chart-and-app-release'
+        if: github.event.client_payload.action == 'chart-and-app-release' && !contains(steps.latest_tag.outputs.tag, 'rc')
         uses: peter-evans/repository-dispatch@v2
         with:
           token: ${{ secrets.GITHUB_TOKEN }}