Upgrade: 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/deploy_oss.yml

@@ -6,7 +6,7 @@ jobs:
     name: Deploy to Aliyun OSS
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: "mv docs dist"
       - name: Deploy OSS
         uses: JayMeDotDot/[email protected]

.github/workflows/doc_test.yml

@@ -6,7 +6,7 @@ jobs:
     name: Rust toolchain CI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable

.github/workflows/solution_test.yml

@@ -6,7 +6,7 @@ jobs:
     name: Rust toolchain CI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable

.github/workflows/solution_test_cn.yml

@@ -6,7 +6,7 @@ jobs:
     name: Rust toolchain CI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable