Исправил опечатку в README.md#39476

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

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