chore(main): release 4.7.0 (#920)
chore(main): release 4.7.0 (#920)

:robot: I have created a release *beep* *boop*
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## [4.7.0](https://github.com/googleapis/nodejs-dialogflow/compare/v4.6.0...v4.7.0) (2022-03-25)


### Features

* added export documentation method ([35a77f4](https://github.com/googleapis/nodejs-dialogflow/commit/35a77f432d7d12dfe3e56370e2205ca37dd89a7d))
* added option to configure the number of sentences in the suggestion context ([#917](https://github.com/googleapis/nodejs-dialogflow/issues/917)) ([17aa7d6](https://github.com/googleapis/nodejs-dialogflow/commit/17aa7d68c933382ea633727181e399f32f770409))
* removed OPTIONAL for speech model variant docs: added more docs for speech model variant and improved docs format for participant ([#906](https://github.com/googleapis/nodejs-dialogflow/issues/906)) ([7df7d27](https://github.com/googleapis/nodejs-dialogflow/commit/7df7d2798490e0a32c7f0bb15de0b1aec7666b43))

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