docs(rule83): improve wording & fix vNext [no ci]

Author: knocte

docs/content/how-tos/rules/FL0083.md

@@ -6,19 +6,19 @@ hide_menu: true
 
 # UnneededRecKeyword (FL0083)
 
-*Introduced in `0.23.1`*
+*Introduced in `0.23.8`*
 
 ## Cause
 
-Recursive functions (functions with a "rec" keyword) does not call themselves.
+Recursive function (function marked with a "rec" keyword) does not invoke itself.
 
 ## Rationale
 
 Using "rec" keyword on a function that is not recursive is unnecessary.
 
 ## How To Fix
 
-Update the function to call itself or remove "rec" keyword if that function doesn't need to call recursively.
+Update the function to invoke itself or remove "rec" keyword in case it doesn't need to invoke itself recursively.
 
 ## Rule Settings