fix(公告分类): 将备注字符限制从500减少到100个字符

src/views/announcement/category/category.vue

@@ -225,8 +225,8 @@ export default {
                         hide: true,
                         rules: [
                             {
-                                max: 500,
-                                message: "备注不能超过500个字符",
+                                max: 100,
+                                message: "备注不能超过100个字符",
                                 trigger: "blur"
                             }
                         ]