Update about.md

Hello,

Small typo in line 101, I replaced : with =

Please accept my humble contribution.

Regards,
Zak Web

Hi @zakweb3,

Could you please combine this change with the first PR that you opened? Having multiple tiny PRs for a single exercise is hard to track, and creates extra work for maintainers.

Many thanks!

Combined PR approved and merged. Thanks for your contribution! :smile: