LibWeb/IDB: Fix a bug where the KeyGenerator was not incremented

Author: https://github.com/stelar7
Commit: 577f799240
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4476
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/IndexedDB/IDBObjectStore.h

@@ -31,7 +31,7 @@ public:
 
     // https://w3c.github.io/IndexedDB/#dom-idbobjectstore-autoincrement
     // The autoIncrement getter steps are to return true if this’s object store has a key generator, and false otherwise.
-    bool auto_increment() const { return m_store->key_generator().has_value(); }
+    bool auto_increment() const { return m_store->uses_a_key_generator(); }
     JS::Value key_path() const;
     String name() const { return m_name; }
     WebIDL::ExceptionOr<void> set_name(String const& value);