Remove confusing reference to Object.getOwnPropertyNames() (#31715)

* Update index.md to remove " (as with Object.getOwnPropertyNames())"

Previous text: "...does not imply that hasOwnProperty itself is confined strictly to enumerable items (as with Object.getOwnPropertyNames())."

This seems to imply that Object.getOwnPropertyNames is limited to enumerable items.

* Update index.md to clarify reference to `Object.getOwnPropertyNames` as a non-enumerable iterator

* Update files/en-us/web/javascript/reference/global_objects/object/hasownproperty/index.md

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

files/en-us/web/javascript/reference/global_objects/object/hasownproperty/index.md

@@ -117,8 +117,8 @@ for (const name in buz) {
 Note that the {{jsxref("Statements/for...in", "for...in")}} loop
 only iterates enumerable items: the absence of non-enumerable properties emitted
 from the loop does not imply that `hasOwnProperty` itself is confined strictly
-to enumerable items (as with
-{{jsxref("Object.getOwnPropertyNames()")}}).
+to enumerable items. You can iterate over non-enumerable properties with
+{{jsxref("Object.getOwnPropertyNames()")}}.
 
 ### Using hasOwnProperty as a property name