Fix Windows wheels building

Author: Matevz Morato

.github/workflows/main.yml

@@ -207,6 +207,11 @@ jobs:
       - name: Select Windows SDK
         run: echo "CMAKE_ARGS=-DCMAKE_SYSTEM_VERSION=${{ env.CMAKE_WINDOWS_SDK_VERSION }}" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
 
+      - name: Set UTF-8 encoding
+        run: |
+          echo "PYTHONIOENCODING=utf-8" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+          echo "PYTHONUTF8=1" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
       - name: Install dependencies
         run: choco install strawberryperl
       - name: Set up Python ${{ matrix.python-version }}