maint: update GHA test data source

Author: oesteban

.github/workflows/travis.yml

@@ -35,7 +35,6 @@ jobs:
       run: |
         $CONDA/bin/conda install -c conda-forge git-annex datalad pip codecov pytest
         $CONDA/bin/python -m pip install datalad-osf
-        # $CONDA/bin/pip install git+https://github.com/Lykos153/AnnexRemote.git
 
     - uses: actions/cache@v2
       with:
@@ -50,7 +49,7 @@ jobs:
         mkdir -p /home/runner/testdata
         cd /home/runner/testdata
 
-        $CONDA/bin/datalad install https://github.com/nipreps-data/nitransforms-tests.git
+        $CONDA/bin/datalad install https://gin.g-node.org/oesteban/nitransforms-tests
         $CONDA/bin/datalad update --merge -d nitransforms-tests/
         $CONDA/bin/datalad get -d nitransforms-tests/