Fixed README.md typo: where -> were

[moppius]

No description provided.

[google-cla]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here with @googlebot I signed it! and we'll verify it.

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[moppius]

@googlebot I signed it!

[markmandel]

/gcbrun

(Whoops, had this turned on by accident - nice catch!)

[quilkin-bot]

Build Succeeded 🥳

Build Id: 32ef8262-aa06-4aef-887a-2efe15f489a0

To build this version:

git fetch git@github.com:googleforgames/quilkin.git pull/337/head:pr_337 && git checkout pr_337
cargo build

[XAMPPRocky]

Thank you for your PR, and congrats on your first contribution! 🎉