NET-1484 Modify Rule S3626 to include an exception

rules/S3626/csharp/rule.adoc

@@ -1,6 +1,6 @@
 == Why is this an issue?
 
-Jump statements, such as ``++return++``, ``++yield break++``, ``++goto++``, and ``++continue++`` let you change the default flow of program execution, but jump statements that direct the control flow to the original direction are just a waste of keystrokes.
+Jump statements, such as `return`, `yield break`, `goto`, and `continue` are used to change the normal flow of execution in a program. However, redundant jump statements can make code difficult to read and maintain.
 
 === Noncompliant code example
 
@@ -41,6 +41,10 @@ void Foo()
 }
 ----
 
+=== Exceptions
+
+* `return` statements followed by a local function declaration are not considered redundant, as they help with readability.
+
 ifdef::env-github,rspecator-view[]
 
 '''