Fix typo in viz.py (#9533)
Fix typo in viz.py (#9533)


zhouyao1994/incubator-superset,mistercrunch/panoramix,airbnb/caravel,airbnb/superset,airbnb/caravel,zhouyao1994/incubator-superset,airbnb/superset,apache/incubator-superset,airbnb/superset,mistercrunch/panoramix,airbnb/caravel,mistercrunch/panoramix,airbnb/superset,mistercrunch/panoramix,apache/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,airbnb/caravel,zhouyao1994/incubator-superset,apache/incubator-superset,apache/incubator-superset,zhouyao1994/incubator-superset