Merge pull request 'chore(deps): update actions/checkout action to v4' (#11) from renovate/actions-checkout-4.x into main

Reviewed-on: #11

.gitea/workflows/linting.yaml

@@ -14,7 +14,7 @@ jobs:
   pylint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install dependencies
         uses: ./.gitea/actions/poetrybuild
       - name: Lint with pylint
@@ -23,7 +23,7 @@ jobs:
   formatting:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install dependencies
         uses: ./.gitea/actions/poetrybuild
       - name: Test formatting with isort and black
@@ -34,7 +34,7 @@ jobs:
   mypy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install dependencies
         uses: ./.gitea/actions/poetrybuild
       - name: Test typing with mypy