Merge pull request #13090 from awanlin/topic/revert-heading-size

[TechDocs] Fix large headings

.changeset/dull-fans-hug.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs': patch
+---
+
+Added back reduction in size, this fixes the extremely large TeachDocs headings

plugins/techdocs/src/reader/transformers/styles/rules/typeset.ts

@@ -47,7 +47,8 @@ ${headings.reduce<string>((style, heading) => {
     let factor: number | string = 1;
     if (typeof value === 'number') {
       // convert px to rem
-      factor = value / htmlFontSize;
+      // 60% of the size defined because it is too big
+      factor = (value / htmlFontSize) * 0.6;
     }
     if (typeof value === 'string') {
       factor = value.replace('rem', '');