doc: add doc-only deprecation for toUSVString

doc/api/deprecations.md

@@ -3360,6 +3360,21 @@ Type: Runtime
 In a future version of Node.js, the `asyncResource` property will no longer
 be added when a function is bound to an `AsyncResource`.
 
+### DEP0173: `util.toUSVString`
+
+<!-- YAML
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/47342
+    description: Documentation-only deprecation.
+-->
+
+Type: Documentation-only
+
+[`util.toUSVString()`][] is replaced with [`String.prototype.toWellFormed`][]
+after V8 11.3. It is recommended to use the built-in function for performance
+reasons.
+
 [NIST SP 800-38D]: https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf
 [RFC 6066]: https://tools.ietf.org/html/rfc6066#section-3
 [RFC 8247 Section 2.4]: https://www.rfc-editor.org/rfc/rfc8247#section-2.4
@@ -3382,6 +3397,7 @@ be added when a function is bound to an `AsyncResource`.
 [`Server.getConnections()`]: net.md#servergetconnectionscallback
 [`Server.listen({fd: <number>})`]: net.md#serverlistenhandle-backlog-callback
 [`SlowBuffer`]: buffer.md#class-slowbuffer
+[`String.prototype.toWellFormed`]: https://chromestatus.com/feature/5200195346759680
 [`WriteStream.open()`]: fs.md#class-fswritestream
 [`assert`]: assert.md
 [`asyncResource.runInAsyncScope()`]: async_context.md#asyncresourceruninasyncscopefn-thisarg-args
@@ -3498,6 +3514,7 @@ be added when a function is bound to an `AsyncResource`.
 [`util.isSymbol()`]: util.md#utilissymbolobject
 [`util.isUndefined()`]: util.md#utilisundefinedobject
 [`util.log()`]: util.md#utillogstring
+[`util.toUSVString()`]: util.md#utiltousvstringstring
 [`util.types`]: util.md#utiltypes
 [`util`]: util.md
 [`worker.exitedAfterDisconnect`]: cluster.md#workerexitedafterdisconnect