Update contributors.yml

Author: oppegard

org/contributors.yml

@@ -146,6 +146,7 @@ contributors:
 - nouseforaname
 - nvvalchev
 - ohkyle
+- oppegard
 - pabloarodas
 - paketo-bot
 - paketo-bot-reviewer
@@ -228,4 +229,4 @@ contributors:
 - ystros
 - zucchinidev
 - MNoeva
-- s-yonkov-yonkov
+- s-yonkov-yonkov