docs: update UPDATING.md with security simplification info (#12097)
docs: update UPDATING.md with security simplification info (#12097)

* docs: update UPDATING.md with security simplification info

* update docs better readability
apache/incubator-superset,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,airbnb/caravel,zhouyao1994/incubator-superset,apache/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,zhouyao1994/incubator-superset,airbnb/caravel,airbnb/caravel,apache/incubator-superset,mistercrunch/panoramix,airbnb/caravel,mistercrunch/panoramix,mistercrunch/panoramix