chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
         node-version: [ 24.x ]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v6
         with:

.github/workflows/deploy-docs.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Node.js 24.x
         uses: actions/setup-node@v6
         with:

.github/workflows/release.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout Repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0