build(deps): bump actions/checkout from 4 to 6 (#366)

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: dependabot[bot]

.github/workflows/main.yml

@@ -18,7 +18,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v4
+                uses: actions/checkout@v6
 
             -   name: Install
                 uses: ./.github/actions/install
@@ -32,7 +32,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v4
+                uses: actions/checkout@v6
             -   name: Install
                 uses: ./.github/actions/install
                 with:
@@ -48,7 +48,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v4
+                uses: actions/checkout@v6
 
             -   name: Install
                 uses: ./.github/actions/install
@@ -69,7 +69,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             -   name: Checkout
-                uses: actions/checkout@v4
+                uses: actions/checkout@v6
 
             -   name: Install
                 uses: ./.github/actions/install
@@ -91,7 +91,7 @@ jobs:
         if: ${{ github.ref_name == 'master' }}
         steps:
             -   name: Checkout
-                uses: actions/checkout@v4
+                uses: actions/checkout@v6
 
             -   name: Install
                 uses: ./.github/actions/install