doc: make perf_hooks Extends usage consistent

The docs use `* Extends: {type}` to define inheritance. This
commit updates the perf_hooks documentation to be consistent.

PR-URL: https://github.com/nodejs/node/pull/33777


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>