fix class level javadoc

Author: lbalmaceda

src/main/java/com/auth0/json/mgmt/EmailTemplate.java

@@ -5,7 +5,7 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 /**
- * Class that represents an Auth0 Guardian Factor object. Related to the {@link com.auth0.client.mgmt.GuardianEntity} entity.
+ * Class that represents an Email Template object. Related to the {@link com.auth0.client.mgmt.EmailTemplatesEntity} entity.
  */
 @SuppressWarnings({"unused", "WeakerAccess"})
 @JsonIgnoreProperties(ignoreUnknown = true)