Tracking issue for updating MDN Temporal docs with new era names

[justingrant]

The MDN Temporal docs contain era names. I assume that these docs will need to be updated. For example, from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/PlainDate/era:

When setting eras, each code may have some aliases; for example, "ce" and "ad" are equivalent to "gregory", and "bce" and "bc" are equivalent to "gregory-inverse".