Bump actions/checkout from 3 to 4 (#26)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/lint.yaml

@@ -13,7 +13,7 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install Go
         uses: actions/setup-go@v4

.github/workflows/test.yaml

@@ -25,7 +25,7 @@ jobs:
           go-version: ${{ matrix.go-version }}
 
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Go cache
         uses: actions/cache@v3

.github/workflows/update-registry.yaml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         registry: [ go.nhat.io, go-staging.nhat.io ]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - id: vars
         run: |