doc: improve crypto.randomUUID() text

* Use present tense.
* Remove "persistently" which suggests that the cache persists across
  Node.js runs.
* Remove "pre-emptively". I think "proactively" is what was meant as
  nothing is being pre-empted here. Regardless of what the adverby
  should be, it seems unnecessary.

PR-URL: https://github.com/nodejs/node/pull/36830
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>

doc/api/crypto.md

@@ -3167,7 +3167,7 @@ added: REPLACEME
 
 * `options` {Object}
   * `disableEntropyCache` {boolean} By default, to improve performance,
-    Node.js will pre-emptively generate and persistently cache enough
+    Node.js generates and caches enough
     random data to generate up to 128 random UUIDs. To generate a UUID
     without using the cache, set `disableEntropyCache` to `true`.
     **Defaults**: `false`.