fix: memory leak in unmount where document event listeners are not being removed (#12101)

* Fix memory leak in unmount where document event listeners are not being removed

* changeset

---------

Co-authored-by: Mark Siano <[email protected]>
Co-authored-by: Rich Harris <[email protected]>
Co-authored-by: Rich Harris <[email protected]>

Author: 3 people

.changeset/bright-berries-smell.md

@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: remove correct event listener from document

packages/svelte/src/internal/client/render.js

@@ -265,7 +265,7 @@ function _mount(Component, { target, anchor, props = {}, events, context, intro
 		return () => {
 			for (const event_name of registered_events) {
 				target.removeEventListener(event_name, bound_event_listener);
-				document.removeEventListener(event_name, bound_event_listener);
+				document.removeEventListener(event_name, bound_document_event_listener);
 			}
 			root_event_handles.delete(event_handle);
 			mounted_components.delete(component);