Update exercises/practice/reverse-string/.approaches/recursion/conten…

…t.md

Co-authored-by: Anastasios Chatzialexiou <16361161+tasxatzial@users.noreply.github.com>

exercises/practice/reverse-string/.approaches/recursion/content.md

@@ -12,7 +12,7 @@
 
 ## Performance considerations
 
-It is not necessarily bad to use recursion as in these two examples.
+It is not necessarily bad to use recursion as shown in the example above.
 In fact, many other approaches use recursion behind the scenes as, for instance, `clojure.string/join` is implemented using recursion.
 However, we should remember that strings are immutable, so code like the above will be inefficient.
 Instead, we should consider using the `StringBuilder` in the recursive function. For example, like so: