docs(FL0071.md): fix CyclomaticComplexity cfg (#703)

Rule settings JSON fragment didn't include the cyclomaticComplexity key.

Author: Darkle

docs/content/how-tos/rules/FL0071.md

@@ -32,9 +32,10 @@ Reducing the cyclomatic complexity of a function typically involves decomposing
 There is a single setting applicable to the cyclomatic complexity, which is the maximum cyclomatic complexity.  
 
     {
-        "enabled": true,
-        "config": {
-            "maxComplexity": 40
-        }
+        "cyclomaticComplexity": {
+            "enabled": true,
+            "config": {
+              "maxComplexity": 40
+            }
+        } 
     }
-