Fix typos in the readme
Fix typos in the readme

vladikoff/mailcheck,giovaniharyadi/mailcheck,mailcheck/mailcheck,gmac/mailcheck,archiveds/mailcheck,giovaniharyadi/mailcheck,vladikoff/mailcheck,mcanthony/mailcheck,nacho87/mailcheck,mcanthony/mailcheck,mailcheck/mailcheck,mcanthony/mailcheck,nacho87/mailcheck,gmac/mailcheck,mailcheck/mailcheck,giovaniharyadi/mailcheck,archiveds/mailcheck,archiveds/mailcheck,vladikoff/mailcheck,gmac/mailcheck,nacho87/mailcheck