fix: 表格消息文字颜色冲突

resources/assets/sass/pages/components/dialog-markdown/markdown.less

@@ -10,6 +10,13 @@ body {
                 background-color: #282c34;
             }
         }
+        .self {
+            .markdown-body {
+                table {
+                    color: #abb2bf;
+                }
+            }
+        }
     }
 
     .markdown-body {
@@ -93,6 +100,9 @@ body {
     .self {
         .markdown-body {
             color: #ffffff;
+            table {
+                color: #383a42;
+            }
         }
     }