fix(editor): commented heading style (#13140)

Close BS-3613

#### PR Dependency Tree


* **PR #13140** 👈

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[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

* **Style**
* Updated default text styling to inherit font weight, style, and
decoration from parent elements when bold, italic, underline, or strike
attributes are not set. This may result in text more closely matching
its surrounding context.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/framework/std/src/inline/utils/attribute-renderer.ts

@@ -30,9 +30,9 @@ function inlineTextStyles(
   }
 
   return styleMap({
-    'font-weight': props.bold ? 'bold' : 'normal',
-    'font-style': props.italic ? 'italic' : 'normal',
-    'text-decoration': textDecorations.length > 0 ? textDecorations : 'none',
+    'font-weight': props.bold ? 'bold' : 'inherit',
+    'font-style': props.italic ? 'italic' : 'inherit',
+    'text-decoration': textDecorations.length > 0 ? textDecorations : 'inherit',
     ...inlineCodeStyle,
   });
 }