modifierOrder option documentation clarification (#1691)

Rules.md

@@ -1260,6 +1260,9 @@ Option | Description
 + private convenience init()
 ```
 
+**NOTE:** If the option value is empty, the following order will be used by default:
+`override,private,fileprivate,internal,package,public,open,private(set),fileprivate(set),internal(set),package(set),public(set),open(set),final,dynamic,optional,required,convenience,indirect,isolated,nonisolated,nonisolated(unsafe),lazy,weak,unowned,static,class,borrowing,consuming,mutating,nonmutating,prefix,infix,postfix`
+
 </details>
 <br/>
 

Sources/Examples.swift

@@ -937,6 +937,9 @@ private struct Examples {
  - convenience private init()
  + private convenience init()
  ```
+
+ **NOTE:** If the option value is empty, the following order will be used by default:
+ `\(_FormatRules.defaultModifierOrder.flatMap { $0 }.joined(separator: ","))`
  """
 
  let strongifiedSelf = """