Bump actions/checkout from 3 to 4 (#377)

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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci-locks.yml

@@ -30,7 +30,7 @@ jobs:
         lock: [py39-lock, py310-lock, py311-lock]
     steps:
     - name: "Checkout"
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: "Environment configure"
       env:
@@ -104,7 +104,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: "Checkout"
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: "Download lock artifacts"
       uses: actions/download-artifact@v3

.github/workflows/ci-tests.yml

@@ -45,7 +45,7 @@ jobs:
             platform: osx
     steps:
     - name: "Checkout"
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: "Environment configure"
       env:

.github/workflows/ci-wheels.yml

@@ -48,7 +48,7 @@ jobs:
           xml_path: /usr/local/Cellar/udunits/2.2.28/share/udunits/udunits2-common.xml
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
@@ -82,7 +82,7 @@ jobs:
     name: "Build sdist"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0