- github action update

Author: janbender

.github/workflows/build-windows.yml

@@ -7,14 +7,22 @@ on:
 jobs:
   build-windows:
 
-    runs-on: ${{ matrix.os }}
+    runs-on: windows-latest
     strategy:
       matrix:
-        os: [windows-latest]
+        python-version: [3.7]
+        # python-version: [2.7, 3.5, 3.6, 3.7, 3.8]
 
     steps:
     # Checkout repo
     - uses: actions/checkout@v3
+      
+    # Set up python
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+    
     # Configure, build and test
     - name: configure
       run: mkdir build-release;cd build-release;cmake ..