Bump mockito-core from 3.4.2 to 3.4.4

Bumps [mockito-core](https://github.com/mockito/mockito) from 3.4.2 to 3.4.4.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](https://github.com/mockito/mockito/compare/v3.4.2...v3.4.4

)

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