Update README.md for HexCambridge 2021 submission

[safiyya-ona]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug

/kind task

/kind feature

What does this PR do / why do we need it:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewers:

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Hi @safiyya-ona. Thanks for your PR.

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