PharoMooc/Exercises/Counter/Exo-Counter.pillar spelling "test" as "text"

[grondak]

In PharoMooc/Exercises/Counter/Exo-Counter.pillar

line 156 reads: Test methods should start with ''text'' to be automatically executed should read: Test methods should start with ''test'' to be automatically executed

Will submit PR shortly (already in progress)