Fixed a typo in README.md#38231

Golden79Knight wants to merge 1 commit intoibm-developer-skills-network:masteribm-developer-skills-network/jbbmo-Introduction-to-Git-and-GitHub:masterfrom

Golden79Knight:bug-fix-revertGolden79Knight/jbbmo-Introduction-to-Git-and-GitHub:bug-fix-revertCopy head branch name to clipboard