Swap order of commands in README file to run `make test` (#8314)
Swap order of commands in README file to run `make test` (#8314)

If the source code is not properly formatted, `make test` would not run.

[ci skip]
lexmag/elixir,ggcampinho/elixir,lexmag/elixir,pedrosnk/elixir,ggcampinho/elixir,kelvinst/elixir,elixir-lang/elixir,michalmuskala/elixir,kimshrier/elixir,pedrosnk/elixir,joshprice/elixir,kelvinst/elixir,kimshrier/elixir