Update README.md

README.md

@@ -5,7 +5,9 @@ license_link: https://coqui.ai/cpml
 library_name: coqui
 pipeline_tag: text-to-speech
 widget:
-  - text: "Once when I was six years old I saw a magnificent picture"
+- text: Once when I was six years old I saw a magnificent picture
+metrics:
+- accuracy
 ---
 
 # ⓍTTS
@@ -100,4 +102,4 @@ outputs = model.synthesize(
     gpt_cond_len=3,
     language="en",
 )
-```
+```