docs: fix incorrect formatting in browser docs. (#24515)

Address incorrect typing for isEnabled. The root cause of this was due
to missing backticks which caused the docs parser to think that the
return type of the `isEnabled` function was null, where it was supposed
to be a boolean type.

The side effect of this was that the generated typescript typings were
incorrect for this function.

Fixes #24409

Co-authored-by: Sam Saccone <[email protected]>

docs/api/browser-window.md

@@ -1061,7 +1061,7 @@ Disable or enable the window.
 
 #### `win.isEnabled()`
 
-Returns Boolean - whether the window is enabled.
+Returns `Boolean` - whether the window is enabled.
 
 #### `win.setSize(width, height[, animate])`