test venv build

.github/workflows/release_win.yml

@@ -24,11 +24,14 @@ jobs:
         architecture: ${{ matrix.arch }}
     - name: Install dependencies and pyinstall
       run: |
+        python3 -m venv venv
+        . venv/bin/activate
         pip install -U pip setuptools setuptools-scm
         pip install -r requirements.txt
         pip install PyInstaller==6.1.0
     - name: Build binary
       run: |
+        . venv/bin/activate
         python setup.py -V
         pyinstaller --onefile --noconsole -i icon_48x48.ico -p src -n nanovna-saver.exe nanovna-saver.py
     - name: Archive production artifacts