Update README.md

Co-Authored-By: Claudio Moroni <43729990+ClaudMor@users.noreply.github.com>
Co-Authored-By: Pietro Monticone <38562595+pitmonticone@users.noreply.github.com>

Author: 3 people

example/README.md

@@ -29,6 +29,7 @@ using Pkg
 Pkg.activate(@__DIR__)
 # Instantiate the environment 
 Pkg.instantiate()
+
 # Import necessary dependencies
 using Distributions, Graphs, SimpleValueGraphs
 using MultilayerGraphs