修改fetchToken.py，修复检查audio_tts_post错误

src/Guide_stick_system/voice_assistant/fetchToken.py

@@ -58,7 +58,7 @@ def fetch_token():
     # 检查结果中是否包含access_token和scope
     if ('access_token' in result.keys() and 'scope' in result.keys()):
         # 检查scope中是否包含audio_tts_post
-        if not 'audio_tts_post' in result['scope'].split(' '):
+        if 'audio_tts_post' not in result['scope'].split(' '):
             print('please ensure has check the tts ability')
             return ''
         # 返回access_token