doc: added note warning about change to console.endTime()
Checklist
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documentation is changed or added -
the commit message follows commit guidelines
Affected core subsystem(s)
doc
Description of change
I added a note warning about a change to console.endTime(). Prior to https://github.com/nodejs/node/pull/3562, you could call console.endTime multiple times for the same label. This was unintended functionality, but the change needed to be documented.
Related Issue: https://github.com/nodejs/node/issues/6452