Replace Centos links to fix link checker CI (#297)

exclude centos links from linkchecker

Signed-off-by: David Cui <[email protected]>

.github/workflows/link-checker.yml

@@ -16,7 +16,7 @@ jobs:
         id: lychee
         uses: lycheeverse/lychee-action@master
         with:
-          args: --accept=200,403,429  "./**/*.md" "./**/*.txt"
+          args: --accept=200,403,429  "./**/*.md" "./**/*.txt" --exclude "https://centos.pkgs.org/7/*"
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
       - name: Fail if there were link errors