chore(main): release 4.0.1 (#381)

:robot: I have created a release *beep* *boop*
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## [4.0.1](https://github.com/googleapis/nodejs-secret-manager/compare/v4.0.0...v4.0.1) (2022-06-30)


### Bug Fixes

* **docs:** describe fallback rest option ([#379](https://github.com/googleapis/nodejs-secret-manager/issues/379)) ([368cff5](https://github.com/googleapis/nodejs-secret-manager/commit/368cff507737eba4e57fe154d748e0756aaf83d3))

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