build(deps): bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
         with:
           go-version: '1.24.1'
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           path: git-sync
 
@@ -38,7 +38,7 @@ jobs:
         with:
           go-version: '1.24.1'
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           path: git-sync
 
@@ -63,7 +63,7 @@ jobs:
         with:
           go-version: '1.24.1'
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           path: git-sync