build(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -27,7 +27,7 @@ jobs:
     steps:
       -
         name: Check out the repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       -
         id: changes
         name: Check Diff for Changes

.github/workflows/manual.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       -
         name: Check out the repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       -
         name: Build the Dockerfiles
         run: make -j $(nproc)

.github/workflows/publish.yml

@@ -30,7 +30,7 @@ jobs:
     steps:
       -
         name: Check out the repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       -
         id: changes
         name: Check Diff for Changes