ci(action): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     name: release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: true
       - uses: actions/setup-node@v6

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         node-version: [20, 22, 24]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: actions/setup-node@v6
@@ -31,7 +31,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: actions/setup-node@v6