chore(actions): 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/ci.yml

@@ -19,7 +19,7 @@ jobs:
     setup:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
 
             - name: Setup Node.js
               uses: actions/setup-node@v4
@@ -38,7 +38,7 @@ jobs:
         runs-on: ubuntu-latest
         needs: setup
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
 
             - name: Prettier check
               run: pnpm run prettier:check

.github/workflows/codeql.yml

@@ -11,7 +11,7 @@ jobs:
         name: Analyze code
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
 
             - name: Initialize CodeQL
               uses: github/codeql-action/init@v2

.github/workflows/notify.yml

@@ -30,7 +30,7 @@ jobs:
 
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v4
+              uses: actions/checkout@v6
 
             - name: Setup Node.js
               uses: actions/setup-node@v4

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
 
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v6
               with:
                   fetch-depth: 0
 
@@ -70,7 +70,7 @@ jobs:
         timeout-minutes: 45
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
               with:
                   fetch-depth: 0
 
@@ -115,7 +115,7 @@ jobs:
         timeout-minutes: 45
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
 
             - uses: actions/setup-node@v4
               with:
@@ -151,7 +151,7 @@ jobs:
         timeout-minutes: 45
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
 
             - uses: actions/setup-node@v4
               with: