Only run flake8 on labelme/

.github/workflows/ci.yml

@@ -65,7 +65,7 @@ jobs:
       shell: bash -l {0}
       if: matrix.os != 'windows-latest'
       run: |
-        flake8 .
+        flake8 labelme/
 
     - name: Black
       shell: bash -l {0}