ci: bump actions/checkout from 4 to 6

.github/workflows/bump-version.yml

@@ -18,7 +18,7 @@ jobs:
     name: Bump ${{ inputs.bump }} version
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: main
           fetch-depth: 0

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     name: Lint & pre-commit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v5
         with:
@@ -35,7 +35,7 @@ jobs:
     name: Test (Python 3.13)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v5
         with:
@@ -58,7 +58,7 @@ jobs:
     name: HACS validation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: hacs/action@main
         with:
@@ -68,6 +68,6 @@ jobs:
     name: Home Assistant hassfest
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: home-assistant/actions/hassfest@master

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
     name: Build ZIP and create GitHub Release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Get version from tag
         id: version

.github/workflows/sync-labels.yml

@@ -14,7 +14,7 @@ jobs:
     name: Sync repository labels
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: EndBug/label-sync@v2
         with: