Issue 377 (#383)

* feat: Implements speech fixes #377

* docs: Automatic update of API docs

* chore: Updated speech translation.

Co-authored-by: Dennis Ploeger <develop@dieploegers.de>
Co-authored-by: dploeger <dploeger@users.noreply.github.com>

docs/api/ESCSaveSettings.md

@@ -66,13 +66,13 @@ export var sfx_volume: float = 0
 
  Volume of SFX only
 
-### voice\_volume
+### speech\_volume
 
 ```gdscript
-export var voice_volume: float = 0
+export var speech_volume: float = 0
 ```
 
-Voice volume only
+Speech volume only
 
 ### fullscreen