Fixed footer year typo in README.md#936

vyshnavs0003-sys wants to merge 1 commit intoibm-developer-skills-network:mainibm-developer-skills-network/mcino-Introduction-to-Git-and-GitHub:mainfrom

vyshnavs0003-sys:bug-fix-typovyshnavs0003-sys/mcino-Introduction-to-Git-and-GitHub:bug-fix-typoCopy head branch name to clipboard