Bump actions/checkout from 2 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v3)

---
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

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         submodules: true
         fetch-depth: 1

.github/workflows/check_md_links.yml

@@ -13,5 +13,5 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v3
     - uses: gaurav-nelson/github-action-markdown-link-check@v1

.github/workflows/miss_hit.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         submodules: true
         fetch-depth: 1

.github/workflows/run_tests.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         submodules: true
         fetch-depth: 1