Update Readme file for 80 chars per line

It's useless.

Is actually useful

• Part of PHP CodeSniffer - Command Line Usage →
• Patch was created a long time ago
• On that time the goal was to learn/ practice workflow on community
• Also contribute with small fixes
• Definitely don't impacts the functionality
• We can say that the Priority is Minor
• But valid since is a framework that follows standards
• Anyway, as a maintainer you may not accept it, and it doesn't matter
• Just like everyone can be ignorant
• Last but not least; useless is someone answer an issue from 7 years ago :)

I become a co-maintainer only two weeks ago.