Fix typo in biome config installation instructions

[jmuzina]

Done

Fixes a typo in the biome config installation instructions (incorrect bun install syntax)

PR readiness check

• [x] PR should have one of the following labels:
  • Feature 🎁, Breaking Change 💣, Bug 🐛, Documentation 📝, Maintenance 🔨.
• [x] All packages define the required scripts in package.json: build, check, and check:fix.