docs: change default return type of Response.finished to string (#5261)

docs/src/api/class-response.md

@@ -8,7 +8,7 @@
 Returns the buffer with response body.
 
 ## async method: Response.finished
-- returns: <[null]|[Error]>
+- returns: <[null]|[string]>
 
 Waits for this response to finish, returns failure error if request failed.
 

docs/src/api/javascript.md

@@ -1,3 +1,7 @@
+## async method: Response.finished
+* langs: js
+- returns: <[null]|[Error]>
+
 ### param: ElementHandle.evalOnSelector.expression = %%-js-evalonselector-pagefunction-%%
 ### param: ElementHandle.evalOnSelectorAll.expression = %%-js-evalonselectorall-pagefunction-%%
 ### param: Frame.evalOnSelector.expression = %%-js-evalonselector-pagefunction-%%

docs/src/api/python.md

@@ -85,10 +85,6 @@ Raw script content.
 * langs: python
 - returns: <[null]|[string]>
 
-## async method: Response.finished
-* langs: python
-- returns: <[null]|[string]>
-
 ## async method: Page.waitForEvent
 * langs: python
 - returns: <[EventContextManager]>