chore(deps): bump highlight.js from 9.15.6 to 9.18.1 (#9595)

Bumps [highlight.js](https://github.com/highlightjs/highlight.js) from 9.15.6 to 9.18.1.
- [Release notes](https://github.com/highlightjs/highlight.js/releases)
- [Changelog](https://github.com/highlightjs/highlight.js/blob/master/CHANGES.md)
- [Commits](https://github.com/highlightjs/highlight.js/compare/9.15.6...9.18.1)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

package.json

@@ -31,7 +31,7 @@
     "frappe-datatable": "^1.15.1",
     "frappe-gantt": "^0.1.0",
     "fuse.js": "^3.4.6",
-    "highlight.js": "^9.12.0",
+    "highlight.js": "^9.18.1",
     "js-sha256": "^0.9.0",
     "jsbarcode": "^3.9.0",
     "moment": "^2.20.1",

yarn.lock

@@ -2676,10 +2676,10 @@ hex-color-regex@^1.1.0:
   resolved "https://registry.yarnpkg.com/hex-color-regex/-/hex-color-regex-1.1.0.tgz#4c06fccb4602fe2602b3c93df82d7e7dbf1a8a8e"
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
-highlight.js@^9.12.0:
-  version "9.15.6"
-  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.15.6.tgz#72d4d8d779ec066af9a17cb14360c3def0aa57c4"
-  integrity sha512-zozTAWM1D6sozHo8kqhfYgsac+B+q0PmsjXeyDrYIHHcBN0zTVT66+s2GW1GZv7DbyaROdLXKdabwS/WqPyIdQ==
+highlight.js@^9.18.1:
+  version "9.18.1"
+  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.18.1.tgz#ed21aa001fe6252bb10a3d76d47573c6539fe13c"
+  integrity sha512-OrVKYz70LHsnCgmbXctv/bfuvntIKDz177h0Co37DQ5jamGZLVmoCVMtjMtNZY3X9DrCcKfklHPNeA0uPZhSJg==
 
 homedir-polyfill@^1.0.1:
   version "1.0.3"