switches pr-markdown-link-check version to whitelisted one (#224)

**Description**

Changes proposed in this pull request:

- switches pr-markdown-link-check version to whitelisted one
- ...
- ...

**Related issue(s)**
<!-- If you refer to a particular issue, provide its number. For
example, `Resolves #123`, `Fixes #43`, or `See also #33`. -->

.github/workflows/pr-markdown-link-check.yaml

@@ -6,12 +6,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: gaurav-nelson/github-action-markdown-link-check@v1
+      - uses: gaurav-nelson/github-action-markdown-link-check@d53a906aa6b22b8979d33bc86170567e619495ec
         with:
           use-quiet-mode: 'yes'  
           use-verbose-mode: 'yes'
           config-file: '.mlc.config.json'
           folder-path: '.'
           max-depth: -1
           check-modified-files-only: 'yes'
-          base-branch: '${{ github.base_ref }}'
+          base-branch: '${{ github.base_ref }}'