fix：“优化公告功能”

src/main/java/com/szwl/controller/TNoticeController.java

@@ -38,7 +38,7 @@ public class TNoticeController {
     TNoticeService noticeService;
 
     @ApiOperation(value = "添加公告")
-    @GetMapping("/addNotice")
+    @PostMapping("/addNotice")
     public ResponseModel<?> addNotice(@RequestBody TNotice notice) {
         if(StringUtils.isEmpty(notice.getNote())){
             return R.fail(ResponseCodesEnum.A0001,"内容为空");