Update LinkChecker.yml

Author: arnavk23

.github/workflows/LinkChecker.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
         with:
-          ref: "gh-pages"
+          ref: 'gh-pages'
 
       - name: Link Checker
         uses: lycheeverse/[email protected]