Update dolfinx-tests.yml

Author: IgorBaratta

.github/workflows/dolfinx-tests.yml

@@ -51,7 +51,7 @@ jobs:
         with:
           path: ./dolfinx
           repository: FEniCS/dolfinx
-          ref: garth/ffcx-types
+          ref: main
       - name: Get DOLFINx source (specified branch/tag)
         if: github.event_name == 'workflow_dispatch'
         uses: actions/checkout@v4