fix: updated footer year to 2023#46334

Adhithya200503 wants to merge 1 commit intoibm-developer-skills-network:masteribm-developer-skills-network/jbbmo-Introduction-to-Git-and-GitHub:masterfrom

Adhithya200503:bug-fix-revertAdhithya200503/jbbmo-Introduction-to-Git-and-GitHub:bug-fix-revertCopy head branch name to clipboard