doc: stabilize util.styleText

PR-URL: #56265
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Adrian Estrada <edsadr@gmail.com>
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>

doc/api/util.md

@@ -1915,13 +1915,16 @@ console.log(util.stripVTControlCharacters('\u001B[4mvalue\u001B[0m'));
 
 ## `util.styleText(format, text[, options])`
 
-> Stability: 1.1 - Active development
+> Stability: 2 - Stable.
 
 <!-- YAML
 added:
   - v21.7.0
   - v20.12.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/56265
+    description: styleText is now stable.
   - version:
     - v22.8.0
     - v20.18.0