Bump actions/checkout from 3 to 4 (#83)

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/go.yml

@@ -15,7 +15,7 @@ jobs:
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: setup go
       uses: actions/setup-go@v4
@@ -59,7 +59,7 @@ jobs:
       MYSQL_PWD: nanomdm
       PORT: 3800
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: setup go
       uses: actions/setup-go@v4