Fix typo in docs: Desiging → Designing

[paescuj]

Pull Request type

• [ ] Bugfix
• [ ] Feature
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes (Please run ./gradlew generateLock saveLock to refresh dependencies)
• [ ] WHOSUSING.md
• [x] Other (please describe): Simple typo

NOTE: Please remember to run ./gradlew spotlessApply to fix any format violations.

Changes in this PR

Fix typo in home page of the docs: Desiging → Designing

Alternatives considered

N/A