Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Go
         uses: actions/setup-go@v4
         with:
@@ -27,7 +27,7 @@ jobs:
         working-directory: ${{ env.WORKSPACE }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: ${{ env.WORKSPACE }}
       - name: Install Go
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           # https://github.com/actions/checkout#fetch-all-history-for-all-tags-and-branches
           fetch-depth: 0
@@ -60,7 +60,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Go
         uses: actions/setup-go@v4
         with:
@@ -72,7 +72,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           # https://github.com/actions/checkout#fetch-all-history-for-all-tags-and-branches
           fetch-depth: 0

.github/workflows/push-images.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           # https://github.com/actions/checkout#fetch-all-history-for-all-tags-and-branches
           fetch-depth: 0

.github/workflows/sync-api.yml

@@ -19,7 +19,7 @@ jobs:
         working-directory: ${{ env.WORKSPACE }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           token: ${{ secrets.CLUSTERPEDIA_BOT_TOKEN }}
           path: ${{ env.WORKSPACE }}