Update headline (#263)

README.md

@@ -59,7 +59,7 @@ A list of **Free** and **Open Source Software** ***(FOSS)*** for **Android** –
     * [Text Editors](#-text-editors)
     * [ToDo Lists](#-todo-lists)
     * [Translation](#-translation)
-    * [TTS](#-tts)
+    * [Text-to-Speech](#-text-to-speech)
     * [Utilities](#-utilities)
     * [Video Player](#-video-player)
     * [VPN](#-vpn)
@@ -603,7 +603,7 @@ A list of **Free** and **Open Source Software** ***(FOSS)*** for **Android** –
 * [**LibreTranslator**](https://codeberg.org/BeoCode/LibreTranslator) <sup>**[[F-Droid](https://www.f-droid.org/app/de.beowulf.libretranslater)]**</sup>
 * [**Arna Translate**](https://github.com/MahanRahmati/translate)
 
-### • TTS
+### • Text-to-Speech
 
 * [**RHVoice**](https://github.com/RHVoice/RHVoice) <sup>**[[F-Droid](https://f-droid.org/app/com.github.olga_yakovleva.rhvoice.android)]**</sup>
 * [**eSpeak**](https://github.com/espeak-ng/espeak-ng) <sup>**[[F-Droid](https://f-droid.org/app/com.reecedunn.espeak)]**</sup>