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

Author: renovate-bot

.github/workflows/cicd.yaml

@@ -21,7 +21,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version-file: .nvmrc

.github/workflows/renovate.yaml

@@ -16,7 +16,7 @@ jobs:
   renovate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: renovatebot/github-action@c91a61c730fa166439cd3e2c300c041590002b1d # v44.0.3
         with:
           configurationFile: .github/renovate.json