fix strikethrough style in docs

(cherry picked from commit 5274b3d84c3b7593a25c8178ba2cfe4743730ad8)

docs/modules/ROOT/pages/tokens.adoc

@@ -4,7 +4,7 @@ Ah, the "token": the world's most powerful and most misunderstood tool.
 
 A token is a _representation of something in the blockchain_. This something can be money, time, services, shares in a company, a virtual pet, anything. By representing things as tokens, we can allow smart contracts to interact with them, exchange them, create or destroy them.
 
-== But First, [line-through]*Coffee* a Primer on Token Contracts
+== But First, [strikethrough]#Coffee# a Primer on Token Contracts
 
 Much of the confusion surrounding tokens comes from two concepts getting mixed up: _token contracts_ and the actual _tokens_.