Skip Mirantis docs in link checker

Add docs.mirantis.com to the skip list. Same Cloudflare/bot-protection
pattern as the Red Hat entries — pages 403 requests from Netlify build
IPs but are reachable in a browser, producing false-positive dead-link
failures (e.g. on docs/oss/3.32/getting-started/kubernetes/community-tested).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ctauchen

src/utils/linkChecker.js

@@ -28,6 +28,7 @@ const defaultSkipList = [
   /^https?:\/\/docs\.openshift\.com\/.*/,
   /^https?:\/\/docs\.redhat\.com\/.*/,
   /^https?:\/\/access\.redhat\.com\/.*/,
+  /^https?:\/\/docs\.mirantis\.com\/.*/,
   'https://en.wikipedia.org/wiki/Autonomous_System_(Internet',
   'https://github.com/dims/etcd3-gateway.git@5a3157a122368c2314c7a961f61722e47355f981',
   'https://installer.calicocloud.io:443/',