chore(deps): bump katex from 0.16.10 to 0.16.21 in /web (#13270)

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web/package.json

@@ -62,7 +62,7 @@
     "js-audio-recorder": "^1.0.7",
     "js-cookie": "^3.0.1",
     "jwt-decode": "^4.0.0",
-    "katex": "^0.16.10",
+    "katex": "^0.16.21",
     "lamejs": "^1.2.1",
     "lexical": "^0.16.0",
     "line-clamp": "^1.0.0",