chore: updates README.md

README.md

@@ -77,7 +77,7 @@ format('An array of %l', ['foo', 10, true]);
 Array elements are converted to strings following the logic
 of the `%v` specifier.
 
-## The `Errorf` class
+## Errorf
 
 The `Errorf` class constructor passes arguments to the format function
 to form an error message.