chore(main): release 2.5.6 (#743)

:robot: I have created a release *beep* *boop*
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### [2.5.6](https://github.com/googleapis/java-core/compare/v2.5.5...v2.5.6) (2022-03-01)


### Dependencies

* update dependency com.google.api.grpc:proto-google-iam-v1 to v1.2.6 ([#742](https://github.com/googleapis/java-core/issues/742)) ([a96416b](https://github.com/googleapis/java-core/commit/a96416b3d1f325ea7c556ab78a0b4e571a5ee2a5))

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This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
8 files changed
tree: 4c83a8a5752415b3885326cb1f1f1eb9e0304feb
  1. java-core/