doc: Removed mentioning Kconfig search from NCS - #142

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: github/codeql-action/analyze@f1f6e5f6af878fb37288ce1c627459e94dbf7d01, github/codeql-action/init@f1f6e5f6af878fb37288ce1c627459e94dbf7d01. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/