fix(ci): stamp helmchart.yaml chartVersion at release time

The HelmChart manifest must have a chartVersion matching the packaged
archive. Replicated cannot match them when the field is empty, causing
helm-archive-missing and helm-chart-missing errors.

After copying helmchart.yaml to release/, use sed to replace the empty
chartVersion with the build version before the release is created.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: aa-replicated

.github/workflows/pr.yml

@@ -58,6 +58,7 @@ jobs:
           cp .replicated release/
           cp embedded-cluster-config.yaml release/
           cp helmchart.yaml release/
+          sed -i "s/chartVersion: \"\"/chartVersion: \"${{ env.CHART_VERSION }}\"/" release/helmchart.yaml
 
       - name: Create Replicated release
         id: create-release

.github/workflows/release.yml

@@ -55,6 +55,7 @@ jobs:
           cp .replicated release/
           cp embedded-cluster-config.yaml release/
           cp helmchart.yaml release/
+          sed -i "s/chartVersion: \"\"/chartVersion: \"${{ env.VERSION }}\"/" release/helmchart.yaml
 
       - name: Create Replicated release
         id: create-release