Fix IMS Toucan API call which was broken by external update.

src/synthesize.py

@@ -111,7 +111,7 @@ def synth_toucan(text:str, model:str):
     		prosody_creativity=0.1,
     		duration_scaling_factor=1,
     		emb1=0,
-    		emb2=0,
+    		#emb2=0,
     		api_name="/predict"
     )
     sampling_rate, wav = wavfile.read(result[0])