elasticsearchKibana update to 1.21.0-bb.0

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/elasticsearch-kibana/-/blob/1.21.0-bb.0/CHANGELOG.md

Package MR

big-bang/product/packages/elasticsearch-kibana!311 (merged)

For Issue

Closes big-bang/product/packages/elasticsearch-kibana#221 (closed)

Upgrade Notices

N/A