Bump composer/semver from 3.4.2 to 3.4.3 in /modules/btcpay

Bumps [composer/semver](https://github.com/composer/semver) from 3.4.2 to 3.4.3.
- [Release notes](https://github.com/composer/semver/releases)
- [Changelog](https://github.com/composer/semver/blob/main/CHANGELOG.md)
- [Commits](composer/semver@3.4.2...3.4.3)

---
updated-dependencies:
- dependency-name: composer/semver
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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