chore: release 6.3.1 (#736)

🤖 I have created a release \*beep\* \*boop\*
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### [6.3.1](https://www.github.com/googleapis/nodejs-translate/compare/v6.3.0...v6.3.1) (2021-10-18)


### Bug Fixes

* add model signature for batch document translation ([#735](https://www.github.com/googleapis/nodejs-translate/issues/735)) ([406c768](https://www.github.com/googleapis/nodejs-translate/commit/406c7684babb00dcda8dfbb07c6210f810972262))
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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).

Author: release-please[bot]

translate/package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@google-cloud/automl": "^2.0.0",
     "@google-cloud/text-to-speech": "^3.0.0",
-    "@google-cloud/translate": "^6.3.0",
+    "@google-cloud/translate": "^6.3.1",
     "@google-cloud/vision": "^2.0.0",
     "yargs": "^16.0.0"
   },