Bump @sentry/browser from 6.5.1 to 6.8.0

Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 6.5.1 to 6.8.0.
- [Release notes](https://github.com/getsentry/sentry-javascript/releases)
- [Changelog](https://github.com/getsentry/sentry-javascript/blob/master/CHANGELOG.md)
- [Commits](getsentry/sentry-javascript@6.5.1...6.8.0)

---
updated-dependencies:
- dependency-name: "@sentry/browser"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>