release: update auto-generated release body

Author: ikreymer

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

@@ -32,12 +32,14 @@ jobs:
         uses: softprops/action-gh-release@v1
         with:
           body: |
-            Deploy this release to Kubernetes with Helm using:
+            This release can be deployed with Helm by running:
 
             ```
             helm upgrade --install btrix https://github.com/webrecorder/browsertrix-cloud/releases/download/${{ env.version }}/browsertrix-cloud-${{ env.version }}.tgz
             ```
 
+            See [the development guide](https://docs.browsertrix.cloud/deploy/) for more info how to deploy Browsertrix Cloud.
+
           files: .chart-out/browsertrix-cloud-${{ env.version }}.tgz
           tag_name: v${{ env.version }}
           fail_on_unmatched_files: true