Fixed typo in footer: updated year to 2023#41461

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

SemaRazouk:masterSemaRazouk/jbbmo-Introduction-to-Git-and-GitHub:masterCopy head branch name to clipboard