chore(deps): update actions/checkout action to v6

Author: renovate-bot

.github/workflows/lint.yml

@@ -12,6 +12,6 @@ jobs:
     name: Linting
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
     - uses: pre-commit/action@v3.0.1

.github/workflows/tests.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v6
         with:

.github/workflows/todos.yml

@@ -9,7 +9,7 @@ jobs:
   todos:
     runs-on: ubuntu-latest
     steps:     
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: wvffle/todo-actions@master
         with: