Fix typo in "lines" problem description
Fix typo in "lines" problem description

The lines problem was describing the "TRANSFORM" exercise but referencing "INPUT OUTPUT".
Live4Code/stream-adventure,jamesanthonyferguson/stream-adventure,ahstro/stream-adventure,martinheidegger/stream-adventure,Gtskk/stream-adventure,jamesanthonyferguson/stream-adventure,jonathantzh/stream-adventure,nirmohi0605/stream-adventure,martinheidegger/stream-adventure,Gtskk/stream-adventure,ll350/my-stream-adventrue,jonathantzh/stream-adventure,martinheidegger/stream-adventure,ahstro/stream-adventure,Live4Code/stream-adventure,aijiekj/stream-adventure,ll350/my-stream-adventrue,ahstro/stream-adventure,ll350/my-stream-adventrue,jonathantzh/stream-adventure,aijiekj/stream-adventure,Live4Code/stream-adventure,nirmohi0605/stream-adventure,Gtskk/stream-adventure,aijiekj/stream-adventure,nirmohi0605/stream-adventure,jamesanthonyferguson/stream-adventure