fix: compatibility with ovos-plugin-manager 1.X.X

Author: JarbasAl

ovos_tts_plugin_SAM/__init__.py

@@ -122,7 +122,7 @@ def get_tts(self, sentence, wav_file, lang=None, voice=None,
         return wav_file, None
 
     @classproperty
-    def available_languages(self) -> set:
+    def available_languages(cls) -> set:
         """Return languages supported by this TTS implementation in this state
         This property should be overridden by the derived class to advertise
         what languages that engine supports.