fix(接口测试): 接口用例标签长度校验有误

--bug=1045271 --user=陈建星 【接口测试】定义-用例-编辑用例-更新标签-输入标签字符在64字符-报错参数校验错误 https://www.tapd.cn/55049933/s/1563966

backend/services/api-test/src/main/java/io/metersphere/api/dto/definition/ApiTestCaseUpdateRequest.java

@@ -41,7 +41,7 @@ public class ApiTestCaseUpdateRequest implements Serializable {
     @Schema(description = "标签")
     private List<
             @NotBlank
-            @Size(min = 1, max = 50, message = "{api_test_case.tag.length_range}")
+            @Size(min = 1, max = 64, message = "{api_test_case.tag.length_range}")
                     String> tags;
 
     @Schema(description = "环境fk")