Bump actions/checkout from 2 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/validate.yaml

@@ -16,7 +16,7 @@ jobs:
     name: With hassfest
     steps:
       - name: 📥 Checkout the repository
-        uses: "actions/checkout@v2"
+        uses: "actions/checkout@v3"
 
       - name: ✅ Hassfest validation
         uses: "home-assistant/actions/hassfest@master"
@@ -26,7 +26,7 @@ jobs:
     name: With HACS Action
     steps:
       - name: 📥 Checkout the repository
-        uses: "actions/checkout@v2"
+        uses: "actions/checkout@v3"
 
       - name: ✅ HACS validation
         uses: "hacs/action@main"