Replace eacronym word ACS with Azure Communication Services

Author: Saisang

articles/communication-services/how-tos/call-automation/includes/secure-webhook-endpoint-java.md

@@ -34,9 +34,9 @@ Each mid-call webhook callback sent by Call Automation uses a signed JSON Web To
   </dependency>
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-4. Configure your application to validate the JWT and the configuration of your ACS resource. You need the `audience` values as it is present in the JWT payload.
+4. Configure your application to validate the JWT and the configuration of your Azure Communication Services resource. You need the `audience` values as it is present in the JWT payload.
 5. Validate the issuer, audience and the JWT token.
-   - The audience is your ACS resource ID you used to set up your Call Automation client. Refer [here](../../../quickstarts/voice-video-calling/get-resource-id.md) about how to get it.
+   - The audience is your Azure Communication Services resource ID you used to set up your Call Automation client. Refer [here](../../../quickstarts/voice-video-calling/get-resource-id.md) about how to get it.
    - The JSON Web Key Set (JWKS) endpoint in the OpenId configuration contains the keys used to validate the JWT token. When the signature is valid and the token hasn't expired (within 5 minutes of generation), the client can use the token for authorization.
 
 This sample code demonstrates how to configure OIDC client to validate webhook payload using JWT