fix(release): use correct tarball name (tns-csi, not headlamp-tns-csi-plugin)

headlamp-plugin package names the tarball from package.json "name" field
which is "tns-csi", producing tns-csi-VERSION.tar.gz.

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

.github/workflows/release.yaml

@@ -56,7 +56,7 @@ jobs:
       - name: Update artifacthub-pkg.yml version and URL
         run: |
           VERSION="${{ inputs.version }}"
-          RELEASE_URL="https://github.com/${{ github.repository }}/releases/download/v${VERSION}/headlamp-tns-csi-plugin-${VERSION}.tar.gz"
+          RELEASE_URL="https://github.com/${{ github.repository }}/releases/download/v${VERSION}/tns-csi-${VERSION}.tar.gz"
 
           sed -i "s|^version:.*|version: \"${VERSION}\"|" artifacthub-pkg.yml
           sed -i "s|headlamp/plugin/archive-url:.*|headlamp/plugin/archive-url: \"${RELEASE_URL}\"|" artifacthub-pkg.yml
@@ -78,7 +78,7 @@ jobs:
 
       - name: Validate tarball
         run: |
-          EXPECTED="headlamp-tns-csi-plugin-${{ inputs.version }}.tar.gz"
+          EXPECTED="tns-csi-${{ inputs.version }}.tar.gz"
           if [ ! -f "$EXPECTED" ]; then
             echo "::error::Expected tarball not found: $EXPECTED"
             exit 1
@@ -88,7 +88,7 @@ jobs:
       - name: Compute checksum
         id: compute_checksum
         run: |
-          TARBALL="headlamp-tns-csi-plugin-${{ inputs.version }}.tar.gz"
+          TARBALL="tns-csi-${{ inputs.version }}.tar.gz"
           CHECKSUM=$(sha256sum "$TARBALL" | awk '{print $1}')
           echo "checksum=${CHECKSUM}" >> $GITHUB_OUTPUT
           echo "Checksum: sha256:${CHECKSUM}"
@@ -113,7 +113,7 @@ jobs:
         uses: softprops/action-gh-release@v2
         with:
           tag_name: "v${{ inputs.version }}"
-          files: headlamp-tns-csi-plugin-${{ inputs.version }}.tar.gz
+          files: tns-csi-${{ inputs.version }}.tar.gz
           fail_on_unmatched_files: true
           draft: false
           prerelease: false