ci(release): fix destination directory of builds

.github/workflows/build-repo.yml

@@ -60,7 +60,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Download and Patch beta PKGBUILDs
-        if: matrix.repo == 'lizardbyte-beta'
+        if: matrix.release_name == 'beta'
         run: |
           # we don't want any stable packages to be built, so remove them
           rm -rf pkgbuilds
@@ -163,6 +163,13 @@ jobs:
 
           build-pacman-repo build
 
+          # ensure files are present in the repo
+          repo_files=$(ls repo)
+          if [[ -z "${repo_files}" ]]; then
+              echo "::error:: No files found in repo"
+              exit 1
+          fi
+
       - name: Create/Update GitHub Release
         if: github.event_name == 'schedule' || github.event_name == 'push'
         uses: ncipollo/release-action@v1.14.0