fix syntax highlighting

Co-authored-by: danyill <[email protected]>

API.md

@@ -94,7 +94,7 @@ Plugins communicate user intent to OpenSCD core by dispatching the following [cu
 
 The **edit event** allows a plugin to describe the changes it wants to make to the current `doc`.
 
-```typescript=
+```typescript
 export type EditDetailV2<E extends Edit = Edit> = {
   edit: E;
   title?: string;