another experimental update of the flake8 gh yaml

Author: wegar-2

.github/workflows/flake8-lint.yml

@@ -18,10 +18,14 @@ jobs:
         with:
           python-version-file: "pyproject.toml"
 
+      - name: Activate uv
+        run: |
+          source .uv/bin/activate
+
       - name: Install dependencies
         run: |
           uv sync
 
       - name: Run Flake8
         run: |
-          flake8 moddata
+          flake8 moddata