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/run_examples.yml

@@ -28,7 +28,7 @@ jobs:
         release: R2020a
 
     - name: Clone bids-matlab
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         submodules: true
         fetch-depth: 1

.github/workflows/run_tests_matlab.yml

@@ -36,7 +36,7 @@ jobs:
         release: ${{matrix.version}}
 
     - name: Clone bids-matlab
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         submodules: true
         fetch-depth: 1

.github/workflows/validate.yml

@@ -16,7 +16,7 @@ jobs:
   validate_cff:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Check whether the citation metadata from CITATION.cff is valid
       uses: citation-file-format/[email protected]
       with:
@@ -25,13 +25,13 @@ jobs:
   codespell:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: codespell-project/actions-codespell@master
 
   markdown_link_check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: gaurav-nelson/github-action-markdown-link-check@v1
       with:
         use-quiet-mode: yes
@@ -45,7 +45,7 @@ jobs:
         command: [mh_style, mh_metric --ci, mh_lint]
       fail-fast: false
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: true
         fetch-depth: 1