Fix example command in README.md
Fix example command in README.md

colobot/colobot-lint,piotrdz/colobot-lint,colobot/colobot-lint,colobot/colobot-lint,colobot/colobot-lint,piotrdz/colobot-lint,piotrdz/colobot-lint,piotrdz/colobot-lint