chore(deps): bump actions/checkout from 3 to 4 (#394)

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/docs.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
     outputs:
       matrix: ${{ steps.versions.outputs.matrix }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: arnested/go-version-action@v1
         id: versions
   build:
@@ -40,7 +40,7 @@ jobs:
           check-latest: true
 
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Build
         run: CGO_ENABLED=0 go build -v .

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
       DOCKER_CLI_EXPERIMENTAL: enabled
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: arnested/go-version-action@v1
         id: go-version
@@ -139,7 +139,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         name: Checkout repository
       - uses: snapcore/action-build@v1
         name: Build snap