Windows CI - add mariadb mysql-connector

Author: rocky

.github/workflows/windows.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [windows]
-        python-version: [ 3.7, 3.8]
+        python-version: [ 3.8, 3.9]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
@@ -23,7 +23,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install wheel
-        choco install llvm
+        choco install llvm mariadb mysql-connector
         pip install pytest
         # Can remove after next Mathics-core release
         python -m pip install -e git+https://github.com/Mathics3/mathics-core#egg=Mathics3[full]