fix bug in code block in provenance-tracking

Author: dyr429

versioned_docs/version-v2.1.1/designing-studies/provenance-tracking.md

@@ -65,7 +65,7 @@ const clickCallback = useCallback((barName: string) => {
         provenanceGraph: trrack.graph.backend,
         answers: {}, // You can set the answers here if you want to control it manually, otherwise leave empty.
     });
-}, [actions, setAnswer, taskid, trrack]);
+}, [actions, setAnswer, trrack]);
 ```
 
 For a full react example, see our [ClickAccuracyTest example](https://github.com/revisit-studies/study/blob/main/src/public/demo-click-accuracy-test/assets/ClickAccuracyTest.tsx)