Fix typo in README.md#46966

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

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