refactored DataValidator email pattern

dao/src/main/java/org/thingsboard/server/dao/service/DataValidator.java

@@ -31,7 +31,7 @@ import java.util.regex.Pattern;
 @Slf4j
 public abstract class DataValidator<D extends BaseData<?>> {
     private static final Pattern EMAIL_PATTERN =
-            Pattern.compile("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}$", Pattern.CASE_INSENSITIVE);
+            Pattern.compile("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,}$", Pattern.CASE_INSENSITIVE);
 
     public void validate(D data, Function<D, TenantId> tenantIdFunction) {
         try {