Voice docs: add Hex (macOS) as recommended STT alongside Handy

Author: pchalasani

docs-site/src/content/docs/plugins-detail/voice.mdx

@@ -121,10 +121,16 @@ plugin.
 ## Recommended: Speech-to-Text Companion
 
 For a complete voice workflow, pair this TTS plugin
-with [Handy](https://github.com/cjpais/Handy)
-(open-source) using the **Parakeet V3** model for
-speech-to-text. It provides stunningly fast,
-near-instant transcription.
+with a speech-to-text app:
+
+- **[Hex](https://github.com/kitlangton/Hex)**
+  (macOS only, open-source) — highly recommended.
+  Faster and more accurate transcriptions with no
+  stuttering.
+- **[Handy](https://github.com/cjpais/Handy)**
+  (open-source) — uses the **Parakeet V3** model.
+  Stunningly fast, near-instant transcription,
+  though may occasionally stutter.
 
 :::tip
 The slight accuracy drop compared to larger STT