Fix bash syntax

Author: asmeurer

.github/workflows/array-api-tests.yml

@@ -35,7 +35,7 @@ jobs:
         if [[ "${{ matrix.numpy-version }}" == "dev" ]]; then
           python -m pip install --pre --extra-index https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy;
         else
-          python -m pip install numpy<2.0;
+          python -m pip install 'numpy<2.0';
         fi
     - name: Run the array API testsuite
       env:

.github/workflows/tests.yml

@@ -22,7 +22,7 @@ jobs:
           if [[ "${{ matrix.numpy-version }}" == "dev" ]]; then
             python -m pip install --pre --extra-index https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy;
           else
-            python -m pip install numpy<2.0;
+            python -m pip install 'numpy<2.0';
           fi
       - name: Run Tests
         run: |