refactor: add file count and size limits to form data in KnowledgeSetting

--bug=1057871 --user=刘瑞斌 【知识库】通用知识库设置中限制上传文档大小功能保存后未生效 https://www.tapd.cn/62980211/s/1721614

ui/src/views/knowledge/KnowledgeSetting.vue

@@ -261,9 +261,13 @@ async function submit() {
           detail.value.type === 1 || detail.value.type === 2
             ? {
                 meta: form.value,
+                file_count_limit: form.value.file_count_limit,
+                file_size_limit: form.value.file_size_limit,
                 ...BaseFormRef.value.form,
               }
             : {
+                file_count_limit: form.value.file_count_limit,
+                file_size_limit: form.value.file_size_limit,
                 ...BaseFormRef.value.form,
               }