Update max line length in CONTRIBUTING.md (#644)
Update max line length in CONTRIBUTING.md (#644)

The maximum line length was increased to 120 characters in our lint rules.
rangle/augury,clbond/augury,clbond/augury,rangle/batarangle,rangle/augury,clbond/augury,rangle/batarangle,rangle/batarangle,rangle/batarangle,rangle/augury,clbond/augury,rangle/augury