Update copyright year in README.md#1633

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

BachKhoaStu:patch-1BachKhoaStu/mcino-Introduction-to-Git-and-GitHub:patch-1Copy head branch name to clipboard