build(deps): bump actions/checkout from 3 to 4

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](https://github.com/actions/checkout/compare/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>

.github/workflows/docker.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Log in to the Container registry
         uses: docker/login-action@cf8514a65188af1d4f94f8c28a7a4153af1088ce

.github/workflows/tests.yml

@@ -135,7 +135,7 @@ jobs:
         if: matrix.os == 'windows-latest'
 
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Build with build.go
         run: |
@@ -231,7 +231,7 @@ jobs:
           go-version: ${{ env.latest_go }}
 
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Cross-compile for subset ${{ matrix.subset }}
         run: |
@@ -249,7 +249,7 @@ jobs:
           go-version: ${{ env.latest_go }}
 
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
@@ -289,7 +289,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Docker meta
         id: meta