Move action venv creation after necessary modules

.forgejo/workflows/build.yaml

@@ -42,11 +42,11 @@ jobs:
           cache: pip
       - name: Set up Python environment
         run: |
-          python3 -m venv venv
-          source venv/bin/activate
           curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
           python3 get-pip.py
-          python3 -m pip install -r requirements.txt
+          python3 -m venv venv
+          source venv/bin/activate
+          pip install -r requirements.txt
       - name: Set up Rust
         uses: https://github.com/dtolnay/rust-toolchain@stable
       - name: Build Rust code