Restrict to numpy<2.1 for numba compatibility

.github/workflows/build-numpy-2.yml

@@ -23,7 +23,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt -r requirements-dev.txt
-        pip install -U numpy
+        pip install -U 'numpy<2.1'
     - name: Run pre-commit
       uses: pre-commit/[email protected]
     - name: Test with pytest (numba jit disabled)