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/build.yml

@@ -12,7 +12,7 @@ jobs:
     name: 🏗️ 🔢 Run Build with Node.js Version ${{ matrix.node }}
     steps:
       - name: 📂 Check out Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       #- name: 🛠️ Set up Node.js
       #  uses: actions/setup-node@v4

.github/workflows/depcheck.yml

@@ -12,7 +12,7 @@ jobs:
     name: 🔍🔗🔢 Run DepCheck with Node.js Version ${{ matrix.node }}
     steps:
       - name: 📂 Check out Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       #- name: 🛠️ Set up Node.js
       #  uses: actions/setup-node@v4

.github/workflows/docs.yml

@@ -12,7 +12,7 @@ jobs:
     name: 📝 🔢 Run TypeDoc with Node.js Version ${{ matrix.node }}
     steps:
       - name: 📂 Check out Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       #- name: 🛠️ Set up Node.js
       #  uses: actions/setup-node@v4

.github/workflows/lint.yml

@@ -15,7 +15,7 @@ jobs:
     name: 🧹 🎨 🔢 Run linters with Node.js Version ${{ matrix.node }}
     steps:
       - name: 📂 Check out Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       #- name: 🛠️ Set up Node.js
       #  uses: actions/setup-node@v4

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
     name: 🧪 🔢 Run Tests with Node.js Version ${{ matrix.node }}
     steps:
       - name: 📂 Check out Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       #- name: 🔧 Set up Node.js
       #  uses: actions/setup-node@v4