fix(ci): ignore prow.ci.openshift.org in markdown link check - #5411

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5, github/codeql-action/analyze@4bdb89f48054571735e3792627da6195c57459e2, github/codeql-action/autobuild@4bdb89f48054571735e3792627da6195c57459e2, github/codeql-action/init@4bdb89f48054571735e3792627da6195c57459e2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

1 issue was detected with this workflow: Please specify an on.push hook to analyze and see code scanning alerts from the default branch on the Security tab.