build(deps): bump actions/checkout from 4 to 6 (#404) (#409)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: tada5hi

.github/workflows/main.yml

@@ -24,7 +24,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v6
             - name: Install
               uses: ./.github/actions/install
               with:
@@ -36,7 +36,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v4
+                uses: actions/checkout@v6
 
             -   name: Install
                 uses: ./.github/actions/install
@@ -56,7 +56,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v6
             - name: Install
               uses: ./.github/actions/install
               with:
@@ -70,7 +70,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v4
+                uses: actions/checkout@v6
 
             -   name: Install
                 uses: ./.github/actions/install