Updated README to use better example in the widget

README.md

@@ -4,7 +4,7 @@ language:
   - code
 license: apache-2.0
 widget:
-  - text: 'public [MASK] isOdd(Integer a){if (a % 2 == 0) {return "even";} else {return "odd";}}'
+  - text: 'public [MASK] isOdd(Integer num){if (num % 2 == 0) {return "even";} else {return "odd";}}'
 ---
 ## JavaBERT
 A BERT-like model pretrained on Java software code.