changed the footer in the readme file#1522

sofiadfc wants to merge 1 commit intoibm-developer-skills-network:mainibm-developer-skills-network/mcino-Introduction-to-Git-and-GitHub:mainfrom

sofiadfc:bug-fix-revertsofiadfc/mcino-Introduction-to-Git-and-GitHub:bug-fix-revertCopy head branch name to clipboard