[Security] Bump highlight.js from 9.14.2 to 9.18.5 in /ui

Bumps [highlight.js](https://github.com/highlightjs/highlight.js) from 9.14.2 to 9.18.5. **This update includes a security fix.**
- [Release notes](https://github.com/highlightjs/highlight.js/releases)
- [Changelog](https://github.com/highlightjs/highlight.js/blob/9.18.5/CHANGES.md)
- [Commits](highlightjs/highlight.js@9.14.2...9.18.5)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

ui/yarn.lock

@@ -6134,9 +6134,9 @@ hex-color-regex@^1.1.0:
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
 highlight.js@^9.11.0:
-  version "9.14.2"
-  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.14.2.tgz#efbfb22dc701406e4da406056ef8c2b70ebe5b26"
-  integrity sha512-Nc6YNECYpxyJABGYJAyw7dBAYbXEuIzwzkqoJnwbc1nIpCiN+3ioYf0XrBnLiyyG0JLuJhpPtt2iTSbXiKLoyA==
+  version "9.18.5"
+  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.18.5.tgz#d18a359867f378c138d6819edfc2a8acd5f29825"
+  integrity sha512-a5bFyofd/BHCX52/8i8uJkjr9DYwXIPnM/plwI6W7ezItLGqzt7X2G2nXuYSfsIJdkwwj/g9DG1LkcGJI/dDoA==
 
 history@^4.9.0:
   version "4.9.0"