[Infra] Upload build-from-HEAD zips on failures (#13414)

Author: ncooke3

.github/workflows/zip.yml

@@ -94,6 +94,7 @@ jobs:
            build-head \
            ${{ matrix.linking_type }}
     - uses: actions/upload-artifact@v4
+      if: ${{ always() }}
       with:
         name: ${{ matrix.linking_type == 'static' && 'Firebase-actions-dir' || 'Firebase-actions-dir-dynamic' }}
         # Zip the entire output directory since the builder adds subdirectories we don't know the