Update sys_payment.htm

src/admin/templets/sys_payment.htm

@@ -174,7 +174,7 @@
 							</div>
 						</form>
 					</div>
-					<button type="submit" class="btn btn-success">保存</button>
+					<div class="text-center"><button type="submit" class="btn btn-success">保存</button></div>
 				</div>
 			</td>
 		</tr>