修复项目合同问题

src/views/goods/create-good.vue

@@ -148,6 +148,7 @@
                   size="small"
                   :disabled="isEdit && isProject"
                   @change="getContract"
+                  @clear="projectClear"
                   clearable
                   filterable>
                 <el-option
@@ -1133,6 +1134,9 @@
       getContract(projectId) {
         this.getContractList(projectId);
       },
+      projectClear() {
+        this.contractList = [];
+      },
       // 获取业务类型
       // getBusinessCategory(){
       //   getBusinessCategory().then((res) => {