Update copyrights year in README.md#45654

stephane-vergier wants to merge 1 commit intoibm-developer-skills-network:masteribm-developer-skills-network/jbbmo-Introduction-to-Git-and-GitHub:masterfrom

stephane-vergier:bug-fix-typostephane-vergier/jbbmo-Introduction-to-Git-and-GitHub:bug-fix-typoCopy head branch name to clipboard