deploy.yml: improve windows

.github/workflows/deploy.yml

@@ -251,6 +251,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install pytest pytest-benchmark pytest-env build cython
+        python -m pip install python-tk
         python -m pip install numpy scipy matplotlib>=3.0.0
     - name: Compile and install
       run: |