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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up JDK
       uses: actions/setup-java@v5
       with:

.github/workflows/publish.yml

@@ -19,7 +19,7 @@ jobs:
         # Reference: https://github.com/lewagon/wait-on-check-action#running-workflow-name
         running-workflow-name: 'Publish package'
         repo-token: ${{ secrets.GITHUB_TOKEN }}
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up JDK
       uses: actions/setup-java@v5
       with: