Remove unnecessary quotes

Author: Bruno Grande

.github/workflows/ci.yml

@@ -155,7 +155,7 @@ jobs:
           context: .
           file: src/docker/Dockerfile
           build-args: |
-            TARBALL_PATH='${{ needs.prepare.outputs.tarball-path }}'
+            TARBALL_PATH=${{ needs.prepare.outputs.tarball-path }}
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}