adjust CI hack

Author: ngoldbaum

.github/workflows/ci.yml

@@ -143,7 +143,7 @@ jobs:
         # FIXME FIXME total hack
         run: |
           .nox/local/bin/python -m ensurepip
-          .nox/local/bin/python -m pip install git+https://github.com/colesbury/cffi@ft
+          .nox/local/bin/python -m pip install git+https://github.com/ngoldbaum/cffi-ft@upstream-pr
           echo "PYTHON_GIL=0" >> $GITHUB_ENV
       - name: Tests
         run: |