[docs] minor file name and format fix for the setup document (#4844)
[docs] minor file name and format fix for the setup document (#4844)


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