Fix KaTeX strict mode console warning

Author: TyMick

components/chart-caption.js

@@ -22,7 +22,7 @@ export default function ChartCaption({ rt, rtLower80, rtUpper80, getRtColor }) {
             ? "\\htmlClass{invisible}{0}"
             : ""
         }`}
-        settings={{ trust: true }}
+        settings={{ trust: true, strict: allowHtml }}
       />
 
       {rtLower80 && rtUpper80 && (
@@ -57,3 +57,7 @@ export default function ChartCaption({ rt, rtLower80, rtUpper80, getRtColor }) {
     </figcaption>
   );
 }
+
+function allowHtml(errorCode, errorMsg, token) {
+  return errorCode === "htmlExtension" ? "ignore" : "warn";
+}