maint: push updates from other repo

.github/workflows/lint.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@main
 
     - name: Install pip
       run: |
@@ -26,6 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         pip install -r requirements.txt
+        pip install flake8
 
     - name: Run flake8
       run: |