LibJS: Convert NumberObject::create() to NonnullGCPtr

Author: https://github.com/linusg
Commit: f990095728
Pull-request: https://github.com/SerenityOS/serenity/pull/16479
Reviewed-by: https://github.com/davidot ✅

Userland/Libraries/LibJS/Runtime/NumberObject.h

@@ -14,7 +14,7 @@ class NumberObject : public Object {
     JS_OBJECT(NumberObject, Object);
 
 public:
-    static NumberObject* create(Realm&, double);
+    static NonnullGCPtr<NumberObject> create(Realm&, double);
 
     virtual ~NumberObject() override = default;