Add bun pronouns

[diracdeltas]

Fix https://github.com/witch-house/pronoun.is/issues/100

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• [x] PR message includes a link to the relevant issue(s) 💁‍♀️🖇️🧾
• [x] Commit messages are well-formatted (please follow this guide) 📝📐
• [ ] New features have test coverage 📋☑️☑️☑️
• [ ] The app boots and pronoun pages are served correctly (try lein ring server) 👩‍💻🚀