docs: add note on loki monolith testing and update helm upgrade command
General MR
Summary
Add a note to avoid unnecessary testing of loki monolith and update the helm upgrade command used to deploy loki as a part of bigbang.
UNCLASSIFIED - NO CUI
Currently supported Big Bang Version is 2.43.0
ATTENTION: Immediate action is required to maintain compatibility with P1 services. Please visit https://p1notifications.dso.mil and see the "DSO.MIL Certificates Renewal" announcement under the "Notifications" section for more details.
UNCLASSIFIED - NO CUI