[docs] Small style changes (#2805)

This PR has some superficial style changes for the docs.

### Change Type

- [ ] `patch` — Bug fix
- [ ] `minor` — New feature
- [ ] `major` — Breaking change
- [ ] `dependencies` — Changes to package dependencies[^1]
- [x] `documentation` — Changes to the documentation only[^2]
- [ ] `tests` — Changes to any test code only[^2]
- [ ] `internal` — Any other changes that don't affect the published
package[^2]
- [ ] I don't know

apps/docs/components/Autocomplete.css

@@ -5,6 +5,10 @@
 	flex-direction: row;
 	border-radius: 24px;
 	padding: 0 16px;
+	border: 1px solid var(--color-tint-2);
+}
+
+.autocomplete__wrapper:focus-within {
 	background-color: var(--color-tint-1);
 }