Update tutorial.jl (#1129)

fixed typo

Author: maeckha

docs/src/tutorial.jl

@@ -64,7 +64,7 @@ end
 ## make a container for model-level properties
 properties = Dict(:min_to_be_happy => 3)
 
-## Create the central `AgentBasedModel` that stores all simution information
+## Create the central `AgentBasedModel` that stores all simulation information
 model = StandardABM(
     Schelling, # type of agents
     space; # space they live in