Bump highlight.js from 9.15.9 to 9.18.5

Bumps [highlight.js](https://github.com/highlightjs/highlight.js) from 9.15.9 to 9.18.5.
- [Release notes](https://github.com/highlightjs/highlight.js/releases)
- [Changelog](https://github.com/highlightjs/highlight.js/blob/9.18.5/CHANGES.md)
- [Commits](https://github.com/highlightjs/highlight.js/compare/9.15.9...9.18.5)

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

package-lock.json

@@ -6193,9 +6193,9 @@
       "dev": true
     },
     "highlight.js": {
-      "version": "9.15.9",
-      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.15.9.tgz",
-      "integrity": "sha512-M0zZvfLr5p0keDMCAhNBp03XJbKBxUx5AfyfufMdFMEP4N/Xj6dh0IqC75ys7BAzceR34NgcvXjupRVaHBPPVQ==",
+      "version": "9.18.5",
+      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.18.5.tgz",
+      "integrity": "sha512-a5bFyofd/BHCX52/8i8uJkjr9DYwXIPnM/plwI6W7ezItLGqzt7X2G2nXuYSfsIJdkwwj/g9DG1LkcGJI/dDoA==",
       "dev": true
     },
     "hmac-drbg": {