chore(deps): bump guzzlehttp/guzzle from 7.10.5 to 7.12.3

Bumps [guzzlehttp/guzzle](https://github.com/guzzle/guzzle) from 7.10.5 to 7.12.3.
- [Release notes](https://github.com/guzzle/guzzle/releases)
- [Changelog](https://github.com/guzzle/guzzle/blob/7.12/CHANGELOG.md)
- [Commits](guzzle/guzzle@7.10.5...7.12.3)

---
updated-dependencies:
- dependency-name: guzzlehttp/guzzle
  dependency-version: 7.12.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]