Fix KaTeX rendering bug on Chrome

Fixes #2500

plugins/tiddlywiki/katex/styles.tid

@@ -7,6 +7,12 @@ tags: [[$:/tags/Stylesheet]]
 
 {{$:/plugins/tiddlywiki/katex/katex.min.css}}
 
+/* Force text-rendering  (see https://github.com/Jermolene/TiddlyWiki5/issues/2500) */
+
+.katex {
+    text-rendering: auto;
+}
+
 /* Override font URLs */
 
 @font-face {