Update tokenizers.js

src/tokenizers.js

@@ -2522,7 +2522,7 @@ export class PreTrainedTokenizer extends Callable {
         if (Array.isArray(this.chat_template)) {
             // Chat templates are stored as lists of dicts with fixed key names,
             // we reconstruct that into a single dict while loading them.
-            const chat_template = {};
+            const chat_template = Object.create(null);
             for (const item of this.chat_template) {
                 chat_template[item['name']] = item['template'];
             }