Update actions/checkout action to v6.0.3 (#138)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/lint.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: ⤵️ Check out code from GitHub
-        uses: actions/checkout@v6.0.2
+        uses: actions/checkout@v6.0.3
 
       - name: 🚀 Run Home Assistant Add-on Lint
         uses: frenck/action-addon-linter@v2

.github/workflows/publisher.yaml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v6.0.2
+        uses: actions/checkout@v6.0.3
 
       - name: Get version
         run: |

.github/workflows/releaser.yml

@@ -61,7 +61,7 @@ jobs:
           prerelease: false
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Checkout addon repo
-        uses: actions/checkout@v6.0.2
+        uses: actions/checkout@v6.0.3
         with:
           path: repo
           repository: lildude/ha-addons

.github/workflows/test.yaml

@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v6.0.2
+        uses: actions/checkout@v6.0.3
 
       - name: Build add-on
         uses: home-assistant/builder@2026.03.2