Bump guzzlehttp/guzzle in /examples/distributed-tracing/src (#685)
Bump guzzlehttp/guzzle in /examples/distributed-tracing/src (#685)

Bumps [guzzlehttp/guzzle](https://github.com/guzzle/guzzle) from 7.4.0 to 7.4.3.
- [Release notes](https://github.com/guzzle/guzzle/releases)
- [Changelog](https://github.com/guzzle/guzzle/blob/master/CHANGELOG.md)
- [Commits](https://github.com/guzzle/guzzle/compare/7.4.0...7.4.3)

---
updated-dependencies:
- dependency-name: guzzlehttp/guzzle
  dependency-type: direct:production
...

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

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
open-telemetry/opentelemetry-php,open-telemetry/opentelemetry-php,open-telemetry/opentelemetry-php