Locked Editor Groups feature is only documented in release notes #6312
Description
Unless a new user reads these sections of old release notes they might not discover this feature:
- https://code.visualstudio.com/updates/v1_60#_locked-editor-groups
- https://code.visualstudio.com/updates/v1_61#_locked-editor-groups
I suggest the information gets added to https://code.visualstudio.com/docs/getstarted/userinterface#_editor-groups