Update membership.pillar

Author: Ducasse

membership.pillar

@@ -9,7 +9,7 @@ By becoming a member of the European Smalltalk Users Group, you support ESUG's *
 - Access to the free books and other ressources
 - The right to vote for board election
 
-!How to become a Member
+! How to become a Member
 
 To become a member of ESUG you can either (or both):
 -subscribe on-line to the *ESUG Mailinglist>https://lists.esug.org/list/esug-list.lists.esug.org*