chore: release 4.6.1 (#791)

🤖 I have created a release \*beep\* \*boop\*
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### [4.6.1](https://www.github.com/googleapis/nodejs-speech/compare/v4.6.0...v4.6.1) (2021-08-17)


### Bug Fixes

* **deps:** google-gax v2.24.1 ([#790](https://www.github.com/googleapis/nodejs-speech/issues/790)) ([bd8ab29](https://www.github.com/googleapis/nodejs-speech/commit/bd8ab29d3b6480d854a8a3a23e520d09d6bdb298))
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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).

speech/package.json

@@ -15,7 +15,7 @@
     "test": "c8 mocha system-test --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/speech": "^4.6.0",
+    "@google-cloud/speech": "^4.6.1",
     "@google-cloud/storage": "^5.0.0",
     "chalk": "^4.0.0",
     "node-record-lpcm16": "^1.0.1",