Bump amazon-cognito-identity-js

Bumps [amazon-cognito-identity-js](https://github.com/aws-amplify/amplify-js) from 5.2.8 to 6.3.7.
- [Release notes](https://github.com/aws-amplify/amplify-js/releases)
- [Changelog](https://github.com/aws-amplify/amplify-js/blob/main/docs/changelog.md)
- [Commits](https://github.com/aws-amplify/amplify-js/compare/amazon-cognito-identity-js@5.2.8...amazon-cognito-identity-js@6.3.7)

---
updated-dependencies:
- dependency-name: amazon-cognito-identity-js
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

amplify/backend/function/amplifyIdentityBrokerAuthorize/src/package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "license": "MIT License",
   "dependencies": {
-    "amazon-cognito-identity-js": "^5.2.8",
+    "amazon-cognito-identity-js": "^6.3.7",
     "jwt-decode": "^3.1.2",
     "uuid": "^8.3.2"
   }