Replace this <i> tag by <em>

IoTSharp/ClientApp/src/app/routes/rules/conditionbuilder/conditionbuilder.component.html

@@ -19,7 +19,7 @@
 
       <nz-tree-node *nzTreeNodeDef="let node; when: hasChild" nzTreeNodeIndentLine>
         <nz-tree-node-toggle>
-          <i nz-icon nzType="caret-down" nzTreeNodeToggleRotateIcon></i>
+          <em nz-icon nzType="caret-down" nzTreeNodeToggleRotateIcon></em>
         </nz-tree-node-toggle>
     
         <nz-select [(ngModel)]="node.field">
@@ -40,11 +40,11 @@
           <nz-option nzLabel="OR" nzValue="||"></nz-option>
         </nz-select>
         <button nz-button nzType="text" nzSize="small" (click)="addNewNode(node)">
-          <i nz-icon nzType="plus" nzTheme="outline"></i>
+          <em nz-icon nzType="plus" nzTheme="outline"></em>
         </button>
     
         <button nz-button nzType="text" nzSize="small" (click)="delete(node)">
-          <i nz-icon nzType="minus" ></i>
+          <em nz-icon nzType="minus" ></em>
         </button>
       </nz-tree-node>
   </nz-tree-view>
@@ -53,10 +53,10 @@
 
     <textarea nz-input placeholder="test expression" [(ngModel)]="expression"  [nzAutosize]="{ minRows: 3, maxRows: 5 }"></textarea>
 <ng-template #suffixTemplateInfo>
-        <i nz-icon nz-tooltip nzTooltipTitle="" nzType="info-circle" ></i>
+        <em nz-icon nz-tooltip nzTooltipTitle="" nzType="info-circle" ></em>
       </ng-template>
 </nz-row>
 
 <nz-row class="customrow">
-  <button nz-button nzType="primary" nzShape="round" (click)="create()"><i nz-icon nzType="download"></i>生成</button> 
-  <button nz-button nzType="primary" nzShape="round" (click)="close()"><i nz-icon nzType="download"></i>关闭</button></nz-row>
+  <button nz-button nzType="primary" nzShape="round" (click)="create()"><em nz-icon nzType="download"></em>生成</button> 
+  <button nz-button nzType="primary" nzShape="round" (click)="close()"><em nz-icon nzType="download"></em>关闭</button></nz-row>