Bump ua-parser-js from 0.7.19 to 0.7.28 in /example

Bumps [ua-parser-js](https://github.com/faisalman/ua-parser-js) from 0.7.19 to 0.7.28.
- [Release notes](https://github.com/faisalman/ua-parser-js/releases)
- [Commits](faisalman/ua-parser-js@0.7.19...0.7.28)

Signed-off-by: dependabot[bot] <[email protected]>