Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...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/benchmark.yml

@@ -14,7 +14,7 @@ jobs:
   benchmark:
     runs-on: [self-hosted, linux, x64, connectorx-benchmark]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Install tools
         run: |

.github/workflows/ci.yml

@@ -53,7 +53,7 @@ jobs:
   #         --health-timeout 5s
   #         --health-retries 20
   #   steps:
-  #     - uses: actions/checkout@v2
+  #     - uses: actions/checkout@v4
 
   #     - name: Install tools
   #       run: |
@@ -176,7 +176,7 @@ jobs:
           --health-retries 20
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Install tools
         run: |

.github/workflows/docs.yml

@@ -9,7 +9,7 @@ jobs:
   docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Install Rust
         uses: actions-rs/toolchain@v1

.github/workflows/import-test.yml

@@ -20,7 +20,7 @@ jobs:
         os: [ubuntu-latest, macos-10.15, windows-latest]
         python-version: ["3.7", "3.8", "3.9", "3.10"]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Setup python
         uses: actions/setup-python@v2

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
       matrix:
         python-version: [[38, "3.8"], [39, "3.9"], [310, "3.10"], [311, "3.11"]]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set python version
         run: |
@@ -88,7 +88,7 @@ jobs:
           - os: "macos-11"
             features: "--features integrated-auth-gssapi"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: ankane/setup-mysql@v1
         with:
@@ -149,7 +149,7 @@ jobs:
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11"]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: ankane/setup-mysql@v1
         with:
@@ -212,7 +212,7 @@ jobs:
         python-version: ["3.8", "3.9", "3.10", "3.11"]
         os: [macos-11, ubuntu-latest, windows-latest]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v2
         with: