Added Example snippet for setting up Redis cache (#4434)
Added Example snippet for setting up Redis cache (#4434)

* Added Example snippet for setting up Redis cache

* Update installation.rst

* Update installation.rst

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