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

Author: renovate[bot]

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
     name: release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: lts/*

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'pull_request' || github.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           cache: npm
@@ -24,7 +24,7 @@ jobs:
       pull-requests: write # to be able to comment on released pull requests
     if: github.event_name == 'push'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           cache: npm