Fix footer year in README.md from 2022 to 2023#463

ShreyaJadhav030 wants to merge 1 commit intoibm-developer-skills-network:mainibm-developer-skills-network/mcino-Introduction-to-Git-and-GitHub:mainfrom

ShreyaJadhav030:bug-fix-typoShreyaJadhav030/mcino-Introduction-to-Git-and-GitHub:bug-fix-typoCopy head branch name to clipboard