Update Highlight.js to latest

We were apparently already using this version in the lock file, but at
least now package.json is clear.

Author: jsharkey13

package.json

@@ -18,7 +18,7 @@
     "core-js": "^3.38.1",
     "dayjs": "^1.11.13",
     "he": "^1.2.0",
-    "highlight.js": "^11.10.0",
+    "highlight.js": "^11.11.1",
     "history": "^4.10.1",
     "html-to-text": "^9.0.5",
     "identity-obj-proxy": "3.0.0",

yarn.lock

@@ -5650,7 +5650,7 @@ headers-polyfill@^4.0.2:
   resolved "https://registry.yarnpkg.com/headers-polyfill/-/headers-polyfill-4.0.3.tgz#922a0155de30ecc1f785bcf04be77844ca95ad07"
   integrity sha512-IScLbePpkvO846sIwOtOTDjutRMWdXdJmXdMvk6gCBHxFO8d+QKOQedyZSxFTTFYRSmlgSTDtXqqq4pcenBXLQ==
 
-highlight.js@^11.10.0:
+highlight.js@^11.11.1:
   version "11.11.1"
   resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-11.11.1.tgz#fca06fa0e5aeecf6c4d437239135fabc15213585"
   integrity sha512-Xwwo44whKBVCYoliBQwaPvtd/2tYFkRQtXDWj1nackaV2JPXx3L0+Jvd8/qCJ2p+ML0/XVkJ2q+Mr+UVdpJK5w==