Update build.yml

Author: cclauss

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools six wheel
-          python -m pip install Cython https://github.com/numpy/numpy@main
+          python -m pip install Cython https://github.com/numpy/numpy
           python -m pip install pytest-cov -r requirements.txt
       - name: Run tests
         # See: #6591 for re-enabling tests on Python v3.11