Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/js_test.yml

@@ -12,7 +12,7 @@ jobs:
       matrix:
         node-version: [ 18, 20, 22, 24 ]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v4
       with:

.github/workflows/publish.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         node-version: [ 18, 20, 22, 24 ]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v4
       with:
@@ -30,7 +30,7 @@ jobs:
       contents: read
       id-token: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           cache: 'npm'
@@ -48,7 +48,7 @@ jobs:
       id-token: write
       packages: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           cache: 'npm'