Try using virtualenv for build action

.forgejo/workflows/build.yaml

@@ -44,7 +44,8 @@ jobs:
         run: |
           curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
           python3 get-pip.py
-          python3 -m venv venv
+          python3 -m pip install virtualenv
+          python3 -m virtualenv venv
           source venv/bin/activate
           pip install -r requirements.txt
       - name: Set up Rust