Update rule docs

Author: ColCh

docs/rules/jsx-wrap-multilines.md

@@ -1,6 +1,6 @@
 # Prevent missing parentheses around multiline JSX (jsx-wrap-multilines)
 
-Wrapping multiline JSX in parentheses can improve readability and/or convenience. It optionally takes a second parameter in the form of an object, containing places to apply the rule. By default, `"declaration"`, `"assignment"`, and `"return"` syntax is checked, but these can be explicitly disabled. Any syntax type missing in the object will follow the default behavior (become enabled).
+Wrapping multiline JSX in parentheses can improve readability and/or convenience. It optionally takes a second parameter in the form of an object, containing places to apply the rule. By default, `"declaration"`, `"assignment"`, `"return"`, and `"arrow"` syntax is checked, but these can be explicitly disabled. Any syntax type missing in the object will follow the default behavior (become enabled).
 
 **Fixable:** This rule is automatically fixable using the `--fix` flag on the command line.
 
@@ -43,4 +43,9 @@ hello = <div>
 var world = <div>
   <p>World</p>
 </div>
+
+// When [1, {arrow: false}]
+var hello = () => <div>
+  <p>World</p>
+</div>
 ```