fix(notification): fix style of break word (element-plus#1701)

Author: kooriookami

packages/theme-chalk/src/notification.scss

@@ -12,8 +12,10 @@
   background-color: $--color-white;
   box-shadow: $--notification-shadow;
   transition: opacity .3s, transform .3s, left .3s, right .3s, top 0.4s, bottom .3s;
+  overflow-wrap: anywhere;
   overflow: hidden;
   z-index: 9999;
+
   &.right {
     right: 16px;
   }
@@ -41,7 +43,6 @@
     margin: 6px 0 0 0;
     color: $--notification-content-color;
     text-align: justify;
-    word-break: break-all;
 
     p {
       margin: 0;