Update concepts/decorators/about.md

Co-authored-by: Yrahcaz <74512479+Yrahcaz7@users.noreply.github.com>

Author: BethanyG

concepts/decorators/about.md

@@ -124,7 +124,7 @@ def my_validator(func):
     def my_wrapper(world):
         print(f"Entering {func.__name__} with {world} argument")
 
-        if (world == "Pluto"):
+        if world == "Pluto":
             print("Pluto is not a planet!")
         else:
             return func(world)