chore(main): release 4.7.0 (#920)

🤖 I have created a release *beep* *boop*
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## [4.7.0](googleapis/nodejs-dialogflow@v4.6.0...v4.7.0) (2022-03-25)


### Features

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

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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).

dialogflow/package.json

@@ -15,7 +15,7 @@
     "test": "mocha system-test --timeout=600000"
   },
   "dependencies": {
-    "@google-cloud/dialogflow": "^4.6.0",
+    "@google-cloud/dialogflow": "^4.7.0",
     "pb-util": "^1.0.0",
     "uuid": "^8.0.0",
     "yargs": "^16.0.0"