Change "Are you down to fence?" on index to h3

Looks bigger and bigger is better.
Signed-off-by: Ethan Madison <ethan@ethanmad.com>

content/_index.md

@@ -29,4 +29,4 @@ We strongly recommend workout clothing and sneakers.
 The club will provide equipment, although feel free to bring your own.
 After reading all of this, there is only one question that remains:
 
-**Are you down to fence?**
+### Are you down to fence?