Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Check out the codebase
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Find add-on directories
         id: addons
@@ -40,7 +40,7 @@ jobs:
 
     steps:
       - name: Check out the codebase
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Run Home Assistant Add-on Lint
         uses: frenck/action-addon-linter@v2

.github/workflows/prometheus_node_exporter.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
         with: