fixed method name as per the azure board review (#18378)

Author: petrsvihlik

sdk/communication/communication-identity/CHANGELOG.md

@@ -8,7 +8,7 @@
 - Updated our internal core package dependencies to their latest versions in order to add support for Opentelemetry 1.0.0 which is compatible with the latest versions of our other client libraries.
 - Changed TS compilation target to ES2017 in order to produce smaller bundles and use more native platform features
 - Added support to build custom Teams endpoint using M365 Teams identities
-  - `CommunicationIdentityClient` added a new method `exchangeTeamsUserAadToken` that provides the ability to exchange an AAD access token of a Teams user for a Communication Identity access token
+  - `CommunicationIdentityClient` added a new method `getTokenForTeamsUser` that provides the ability to exchange an AAD access token of a Teams user for a Communication Identity access token
 
 ### Breaking Changes
 

sdk/communication/communication-identity/README.md

@@ -125,10 +125,10 @@ await client.deleteUser(user);
 
 ### Exchanging AAD access token of a Teams User for a Communication access token
 
-Use `exchangeTeamsUserAadToken` method to exchange an AAD access token of a Teams user for a new `CommunicationAccessToken` with a matching expiration time.
+Use `getTokenForTeamsUser` method to exchange an AAD access token of a Teams user for a new `CommunicationAccessToken` with a matching expiration time.
 
 ```typescript
-await client.exchangeTeamsUserAadToken('<aad-access-token-of-a-teams-user>');
+await client.getTokenForTeamsUser('<aad-access-token-of-a-teams-user>');
 ```
 
 ## Troubleshooting