Bump actions/checkout from 3 to 4 (#19)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/lint.yaml

@@ -14,7 +14,7 @@ jobs:
  runs-on: "ubuntu-latest"
  steps:
  - name: "Checkout the repository"
- uses: "actions/checkout@v3.5.3"
+ uses: "actions/checkout@v4"
 
  - name: "Set up Python"
  uses: actions/[email protected]

.github/workflows/release.yaml

@@ -15,7 +15,7 @@ jobs:
  contents: write
  steps:
  - name: "Checkout the repository"
- uses: "actions/checkout@v3"
+ uses: "actions/checkout@v4"
 
 
  - name: Gather information

.github/workflows/validate.yaml

@@ -17,7 +17,7 @@ jobs:
  runs-on: "ubuntu-latest"
  steps:
  - name: "Checkout the repository"
- uses: "actions/checkout@v3"
+ uses: "actions/checkout@v4"
 
  - name: "Run hassfest validation"
  uses: "home-assistant/actions/hassfest@master"
@@ -27,7 +27,7 @@ jobs:
  runs-on: "ubuntu-latest"
  steps:
  - name: "Checkout the repository"
- uses: "actions/checkout@v3"
+ uses: "actions/checkout@v4"
 
  - name: "Run HACS validation"
  uses: "hacs/action@main"
@@ -40,7 +40,7 @@ jobs:
  name: Misc Validation
  runs-on: ubuntu-latest
  steps:
- - uses: actions/checkout@v3
+ - uses: actions/checkout@v4
 
  - name: Check Home Assistant version consistency
  shell: bash