Update README.md

Author: gustavoespitia

README.md

@@ -15,9 +15,9 @@ Results are saved in current directory by default or in the directory specified
 
 ## Installation
 ```julia
-julia> using Pkg
-julia> Pkg.add(CSV, DataFrames, Plots, GraphRecipes)
-julia> Pkg.add(url="https://github.com/gisel-uninorte/SimpleDistributionPowerFlow.jl")
+julia> ]
+pkg> add CSV, DataFrames, Plots, GraphRecipes
+pkg> add https://github.com/gisel-uninorte/SimpleDistributionPowerFlow.jl
 ```
 
 ## Configuration files
@@ -121,4 +121,4 @@ It only relies in [DataFrames](https://github.com/JuliaData/DataFrames.jl), [Plo
 Contributions, issues, and feature requests are welcome! 
 
 ## License
-See [license](https://github.com/gisel-uninorte/SimpleDistributionPowerFlow.jl/blob/main/LICENSE)
+See [license](https://github.com/gisel-uninorte/SimpleDistributionPowerFlow.jl/blob/main/LICENSE)