small fix to CI

Author: HLWeil

.github/workflows/build-test.yml

@@ -44,7 +44,7 @@ jobs:
       with:
         python-version: '3.11'
     - name: Setup Virtual Environment
-      run: python -m venv venv
+      run: python -m venv .venv
     - name: Setup Poetry Windows
       if: matrix.os == 'windows-latest'
       run: |