Relax version in the readme

This will help avoid confusion for people who are copy-pasting install instructions from the README.md. For a brief moment, I couldn't understand why burrito is complaining I don't a version 0.11.0 of zig installed

Author: gmile

README.md

@@ -122,7 +122,7 @@ You must have the following installed and in your PATH:
 
     ```elixir
     defp deps do
-      [{:burrito, "~> 1.0.0"}]
+      [{:burrito, "~> 1.0"}]
     end
     ```