Fix link checker

Signed-off-by: Joshua Li <[email protected]>

.github/workflows/link-checker.yml

@@ -24,7 +24,7 @@ jobs:
         id: lychee
         uses: lycheeverse/lychee-action@master
         with:
-          args: --accept=200,403,429  "**/*.html" "**/*.md" "**/*.txt"
+          args: --accept=200,403,429  "./**/*.html" "./**/*.md" "./**/*.txt"
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
       - name: Fail if there were link errors