feat: use build-only to test pull request

Author: khos2ow

.github/workflows/test-pr.yml

@@ -35,14 +35,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Import GPG Key
-        uses: regolith-linux/actions/import-gpg@main
-        with:
-          gpg-key: "${{ secrets.PACKAGE_PRIVATE_KEY2 }}"
-
       - name: Build Package
         uses: regolith-linux/actions/build-package@main
         with:
+          only-build: "true"
           name: "${{ github.event.repository.name }}"
           distro: "${{ matrix.distro }}"
           codename: "${{ matrix.codename }}"