chore(deps): update actions/checkout action to v4 (#230)

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     name: 'Test: node-20, ubuntu-latest'
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install pnpm
         uses: pnpm/action-setup@v2
@@ -52,7 +52,7 @@ jobs:
     name: 'Lint: node-20, ubuntu-latest'
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -79,7 +79,7 @@ jobs:
     name: 'Audit: node-20, ubuntu-latest'
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0