chore: update actions/checkout action to v6 (#225)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
@@ -33,7 +33,7 @@ jobs:
           node: "lts/*"
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-node@v6
       with:
         node-version: ${{ matrix.node }}

.github/workflows/release-please.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: googleapis/release-please-action@v4
         id: release
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         if: ${{ steps.release.outputs.release_created }}
       - uses: actions/setup-node@v6
         with: