fix(sdk): updated universal classification example to reflect new multi-input only API

Author: umarbutler

config/stainless.yaml

@@ -75,7 +75,8 @@ readme:
       params:
         model: "kanon-universal-classifier"
         query: "This is a confidentiality clause."
-        text: "I agree not to tell anyone about the document."
+        texts:
+          - "I agree not to tell anyone about the document."
         chunking_options:
           overlap_ratio: 0.1
           overlap_tokens: null