fixed footer typo: updated 2022 to 2023#41420

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

JussiMo:bug-fix-revertJussiMo/jbbmo-Introduction-to-Git-and-GitHub:bug-fix-revertCopy head branch name to clipboard