doc: improve UV_THREADPOOL_SIZE description

PR-URL: #29033
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: tniessen

doc/api/cli.md

@@ -1203,9 +1203,8 @@ on synchronous system APIs. Node.js APIs that use the threadpool are:
 
 - all `fs` APIs, other than the file watcher APIs and those that are explicitly
   synchronous
-- `crypto.pbkdf2()`
-- `crypto.randomBytes()`, unless it is used without a callback
-- `crypto.randomFill()`
+- asynchronous crypto APIs such as `crypto.pbkdf2()`, `crypto.scrypt()`,
+  `crypto.randomBytes()`, `crypto.randomFill()`, `crypto.generateKeyPair()`
 - `dns.lookup()`
 - all `zlib` APIs, other than those that are explicitly synchronous