fix(plugin-release): strip @scope and / from PKG_NAME for tarball matching (#124)

headlamp-plugin package strips the @ scope prefix and replaces / with -
when naming tarballs (e.g. @privilegedescalation/headlamp-argocd-plugin
becomes privilegedescalation-headlamp-argocd-plugin). The workflow was
using the raw package.json name without this transformation, causing
the Prepare release tarball step to fail when it couldn't find the
expected tarball file.

Co-authored-by: Chris Farhood <chris@farhood.org>

.github/workflows/plugin-release.yaml

@@ -208,7 +208,7 @@ jobs:
       - name: Update artifacthub-pkg.yml
         run: |
           VERSION="${{ inputs.version }}"
-          PKG_NAME=$(jq -r .name package.json)
+          PKG_NAME=$(jq -r .name package.json | sed 's|^@||' | tr '/' '-')
           RELEASE_URL="https://github.com/${{ github.repository }}/releases/download/v${VERSION}/${PKG_NAME}-${VERSION}.tar.gz"
           sed -i "s/^version:.*/version: \"${VERSION}\"/" artifacthub-pkg.yml
           sed -i "s|headlamp/plugin/archive-url:.*|headlamp/plugin/archive-url: \"${RELEASE_URL}\"|" artifacthub-pkg.yml
@@ -241,9 +241,10 @@ jobs:
       - name: Prepare release tarball
         run: |
           VERSION="${{ inputs.version }}"
-          PKG_NAME=$(jq -r .name package.json)
+          # headlamp-plugin strips the @ scope prefix and replaces / with - when naming tarballs.
+          # e.g. @privilegedescalation/headlamp-argocd-plugin -> privilegedescalation-headlamp-argocd-plugin
+          PKG_NAME=$(jq -r .name package.json | sed 's|^@||' | tr '/' '-')
           TARBALL="${PKG_NAME}-${VERSION}.tar.gz"
-          # Rename tarball if headlamp-plugin produced a different name
           for f in *.tar.gz; do
             [ "$f" != "$TARBALL" ] && mv "$f" "$TARBALL"
           done