Fix Windows release pytest temp directory setup (#24)

Author: Masterain98

.github/workflows/release.yml

@@ -35,7 +35,7 @@ jobs:
       - run: python -m pip install -e ".[dev,build,gui]" cyclonedx-bom
       - name: Install Inno Setup
         run: choco install innosetup -y --no-progress
-      - run: python -m pytest -m "not integration" --basetemp .pytest-tmp/release -o cache_dir=.pytest-tmp/cache
+      - run: python -c "import os; os.makedirs('.pytest-tmp', exist_ok=True)" && python -m pytest -m "not integration" --basetemp .pytest-tmp/release -o cache_dir=.pytest-tmp/cache
       - run: python -m build
       - name: Generate PyInstaller version-info resource
         shell: python