doc: add notice about useGlobal option in repl docs
Add notice about the useGlobal option in repl docs.
Fixes: #13827
Checklist
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documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
doc
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Add notice about the useGlobal option in repl docs.
Fixes: #13827
doc