docs(example): modify comment for client_credentials

Signed-off-by: Mathias Gebbe <mathias.gebbe@gmail.com>

Author: matzegebbe

examples/config-dev.yaml

@@ -104,7 +104,7 @@ telemetry:
     # grantTypes determines the allowed set of authorization flows.
 #   grantTypes:
 #     - "authorization_code"
-#     - "client_credentials"   # M2M auth, not included in defaults
+#     - "client_credentials"
 #     - "refresh_token"
 #     - "implicit"
 #     - "password"