Bump github.com/newrelic/go-agent/v3 from 3.15.2 to 3.16.0

Bumps [github.com/newrelic/go-agent/v3](https://github.com/newrelic/go-agent) from 3.15.2 to 3.16.0.
- [Release notes](https://github.com/newrelic/go-agent/releases)
- [Changelog](https://github.com/newrelic/go-agent/blob/master/CHANGELOG.md)
- [Commits](newrelic/go-agent@v3.15.2...v3.16.0)

---
updated-dependencies:
- dependency-name: github.com/newrelic/go-agent/v3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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