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

Author: renovate[bot]

.github/workflows/gh-pages.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         node-version: [20.x]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:

.github/workflows/pr.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         node-version: [20.x]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
@@ -29,7 +29,7 @@ jobs:
       matrix:
         node-version: [20.x]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
@@ -50,7 +50,7 @@ jobs:
       matrix:
         node-version: [20.x]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with: