Add missed break statement

breaks statement was missed in 'openai' tts case.
It makes a bug that requesting openai TTS and novelai TTS both.

This commit will fix this issue.

src/ts/process/tts.ts

@@ -145,6 +145,7 @@ export async function sayTTS(character:character,text:string) {
                     alertError((language.errors.httpError + `${Buffer.from(res.data).toString()}`))
                 }
             }
+            break;
 
         }
         case 'novelai': {