Update README.md

small typo

Author: cloojure

README.md

@@ -1192,7 +1192,7 @@ hints for the pairwise grouping with comments or empty lines.
 <sup>[[link](#dont-flag-constants)]</sup>
 
 * <a name="underscore-for-unused-bindings"></a>
- Use `_` for destructuring targets and formal arguments names whose
+ Use `_` for destructuring targets and formal argument names whose
  value will be ignored by the code at hand.
 <sup>[[link](#underscore-for-unused-bindings)]</sup>