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
       - uses: actions/setup-node@v6
         with:
           node-version: lts/*

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
           - 20
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Use Node.js ${{ matrix.node_version }}
         uses: actions/setup-node@v6
         with:
@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: test_matrix
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node_version }}

.github/workflows/update-prettier.yml

@@ -8,7 +8,7 @@ jobs:
   update_prettier:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           cache: npm