update test

Author: mjfield2

.github/workflows/tests.yml

@@ -24,7 +24,7 @@ jobs:
           python-version: ${{ matrix.python }}
       - name: Install GStatSim
         run: |
-          pip install "numpy<=1.23.4"
+          pip install "numpy<2"
           pip install -e .
           pip install pytest pytest-cov
       - name: Run tests