Update README.md - change date#40141

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

JonCPritchett:bug-fix-typoJonCPritchett/jbbmo-Introduction-to-Git-and-GitHub:bug-fix-typoCopy head branch name to clipboard