Prevent use of broken jaxlib version in testing

.github/workflows/test.yml

@@ -143,7 +143,7 @@ jobs:
         run: |
           mamba install --yes -q "python~=${PYTHON_VERSION}=*_cpython" mkl numpy scipy pip mkl-service graphviz cython pytest coverage pytest-cov sympy
           if [[ $INSTALL_NUMBA == "1" ]]; then mamba install --yes -q -c conda-forge "python~=${PYTHON_VERSION}=*_cpython" "numba>=0.55" numba-scipy; fi
-          mamba install --yes -q -c conda-forge "python~=${PYTHON_VERSION}=*_cpython" jax jaxlib
+          mamba install --yes -q -c conda-forge "python~=${PYTHON_VERSION}=*_cpython" jax "jaxlib!=0.3.15"
           pip install -e ./
           mamba list && pip freeze
           python -c 'import aesara; print(aesara.config.__str__(print_doc=False))'