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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v4
         with:
           python-version: "3.14"
@@ -26,7 +26,7 @@ jobs:
     name: Lint Commit Messages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: wagoid/commitlint-github-action@v5.5.1
@@ -42,7 +42,7 @@ jobs:
           - ubuntu-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
@@ -69,7 +69,7 @@ jobs:
       - commitlint
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/labels.yml

@@ -11,7 +11,7 @@ jobs:
   labels:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - name: Set up Python
         uses: actions/setup-python@v4
         with: