[bug] fix shortener url (#4560)
[bug] fix shortener url (#4560)

[bug] fix shared explore url
timifasubaa/incubator-superset,timifasubaa/incubator-superset,dmigo/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,apache/incubator-superset,airbnb/caravel,airbnb/superset,airbnb/caravel,airbnb/caravel,dmigo/incubator-superset,mistercrunch/panoramix,dmigo/incubator-superset,zhouyao1994/incubator-superset,timifasubaa/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,zhouyao1994/incubator-superset,mistercrunch/panoramix,airbnb/superset,airbnb/caravel,airbnb/superset,airbnb/superset,apache/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,dmigo/incubator-superset,timifasubaa/incubator-superset