Update README.md examples to reflect new version 0.7.1

Author: ponylang-main

README.md

@@ -18,7 +18,7 @@ Please note that if this library encounters a state that the programmers thought
 ## Installation
 
 - Install [corral](https://github.com/ponylang/corral)
-- `corral add github.com/ponylang/lori.git --version 0.7.0`
+- `corral add github.com/ponylang/lori.git --version 0.7.1`
 - `corral fetch` to fetch your dependencies
 - `use "lori"` to include this package
 - `corral run -- ponyc` to compile your application