Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/main.yml

@@ -10,5 +10,5 @@ jobs:
   validate:
     runs-on: "ubuntu-latest"
     steps:
-        - uses: "actions/checkout@v4"
+        - uses: "actions/checkout@v6"
         - uses: "home-assistant/actions/hassfest@master"

.github/workflows/releases.yaml

@@ -15,7 +15,7 @@ jobs:
       contents: write
     steps:
       - name: "Checkout the repository"
-        uses: "actions/checkout@v4.2.2"
+        uses: "actions/checkout@v6.0.1"
 
       - name: "ZIP the integration directory"
         shell: "bash"

.github/workflows/validate.yaml

@@ -11,7 +11,7 @@ jobs:
   validate-hacs:
     runs-on: "ubuntu-latest"
     steps:
-      - uses: "actions/checkout@v4"
+      - uses: "actions/checkout@v6"
       - name: HACS validation
         uses: "hacs/action@main"
         with: