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]>

Author: dependabot[bot]

.github/workflows/bids_validator.yml

@@ -23,7 +23,7 @@ jobs:
       with:
         node-version: '18'
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: true
         fetch-depth: 0

.github/workflows/check_md_links.yml

@@ -18,5 +18,5 @@ jobs:
   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

.github/workflows/codespell.yml

@@ -16,5 +16,5 @@ jobs:
   codespell:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: codespell-project/actions-codespell@master

.github/workflows/run_tests_matlab.yml

@@ -37,7 +37,7 @@ jobs:
         release: ${{matrix.version}}
 
     - name: Install
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         submodules: true
         fetch-depth: 0

.github/workflows/run_tests_octave.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: true
         fetch-depth: 1

.github/workflows/validate_cff.yml

@@ -23,7 +23,7 @@ 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: