Add experimental message to challenge #59

content/challenges/59.md

@@ -4,4 +4,4 @@ date: 2022-04-12
 
 This week's challenge is open-ended! **Write down your favorite thing about spring** and submit it; it can be as short or long as you like. (If you're feeling adventurous, draw it as well, perhaps? :cherry_blossom:)
 
-Depending on how this goes, we me have more open-ended challenges in the future, we'll see...
+**This is an experimental challenge.** Depending on how this goes, we me have more open-ended challenges in the future, we'll see...