Update MAINTENANCE_DOC to reflect Kyverno Mutation
General MR
Summary
This is a Docs only change that updates the DEVELOPMENT_MAINTENANCE.md to note that a Kyverno clusterpolicy
mutates the automountserviceaccounttoken
on the SA
and Pod
MR https://repo1.dso.mil/big-bang/bigbang/-/issues/1843
Relevant logs/screenshots
(Include any relevant logs/screenshots)