Bump projectreactor.version from 3.4.3 to 3.4.4
Bump projectreactor.version from 3.4.3 to 3.4.4

Bumps `projectreactor.version` from 3.4.3 to 3.4.4.

Updates `reactor-core` from 3.4.3 to 3.4.4
- [Release notes](https://github.com/reactor/reactor-core/releases)
- [Commits](https://github.com/reactor/reactor-core/compare/v3.4.3...v3.4.4)

Updates `reactor-test` from 3.4.3 to 3.4.4
- [Release notes](https://github.com/reactor/reactor-core/releases)
- [Commits](https://github.com/reactor/reactor-core/compare/v3.4.3...v3.4.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
AxonFramework/AxonFramework