Changed the footer in README.md#37398

Ed31001 wants to merge 1 commit intoibm-developer-skills-network:masteribm-developer-skills-network/jbbmo-Introduction-to-Git-and-GitHub:masterfrom

Ed31001:bug-fix-typoEd31001/jbbmo-Introduction-to-Git-and-GitHub:bug-fix-typoCopy head branch name to clipboard