Do not remove the 'v' prefix from chart versions

Our other artifacts, such as container images, all use the 'v' prefix
for their versions. Keeping the prefix for the chart versions as well
ensures taht our versioning scheme is consistent.

Author: gonzolino

.github/workflows/release-chart.yaml

@@ -43,13 +43,13 @@ jobs:
         run: |
           if [[ "${{ github.event_name }}" == "push" && "${{ github.ref }}" == "refs/heads/main" ]]; then
             # Use SHA for main branch
-            CHART_VERSION="0.0.0+$(echo ${{ github.sha }} | cut -c1-7)"
+            CHART_VERSION="v0.0.0+$(echo ${{ github.sha }} | cut -c1-7)"
           elif [[ "${{ github.event_name }}" == "push" && "${{ github.ref }}" =~ ^refs/tags/v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-            # Use tag version (strip 'v' prefix)
-            CHART_VERSION="${GITHUB_REF#refs/tags/v}"
+            # Use tag version
+            CHART_VERSION="${GITHUB_REF_NAME}"
           else
             # Use PR SHA for dry run
-            CHART_VERSION="0.0.0+$(echo ${{ github.sha }} | cut -c1-7)"
+            CHART_VERSION="v0.0.0+$(echo ${{ github.sha }} | cut -c1-7)"
           fi
           echo "version=$CHART_VERSION" >> $GITHUB_OUTPUT
 
@@ -67,4 +67,4 @@ jobs:
         run: |
           helm push gardener-extension-provider-ironcore-${{ steps.chart_version.outputs.version }}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts
           helm push gardener-extension-admission-ironcore-runtime-${{ steps.chart_version.outputs.version }}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts
-          helm push gardener-extension-admission-ironcore-application-${{ steps.chart_version.outputs.version }}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts
+          helm push gardener-extension-admission-ironcore-application-${{ steps.chart_version.outputs.version }}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts