added documentation for root certificate rotation (#3298)
added documentation for root certificate rotation (#3298)

* added documentation for root certificate rotation

[sc-14561]

* Update docs/content/tutorial/administrative-tasks.md

Co-authored-by: Chris Bandy <ec31678e3752cc10dc3e3e5dde70d053c5a48709@gmail.com>

* updated per pr comments

Co-authored-by: Chris Bandy <ec31678e3752cc10dc3e3e5dde70d053c5a48709@gmail.com>
CrunchyData/postgres-operator,CrunchyData/postgres-operator