Fix: corrected formula and formatting in README.md#43220

Katlego-Ram2 wants to merge 1 commit intoibm-developer-skills-network:masteribm-developer-skills-network/jbbmo-Introduction-to-Git-and-GitHub:masterfrom

Katlego-Ram2:feature-branchKatlego-Ram2/jbbmo-Introduction-to-Git-and-GitHub:feature-branchCopy head branch name to clipboard