This PR converts all example titles and categories to sentence case, to
make them consistent with our UI and the other examples.
### Change Type
- [x] `documentation` — Changes to the documentation only[^2]
[^1]: publishes a `patch` release, for devDependencies use `internal`
[^2]: will not publish a new version
### Test Plan
1. Look at the examples app.
2. Check that all the titles of examples make you feel calm and good
inside.
- [ ] Unit Tests
- [ ] End to end tests
### Release Notes
- Docs: Made the examples titles sentence case.
59285690d2