fix: Make markdown support line breaks #2315 (#2343)

### What problem does this PR solve?

fix: Make markdown support line breaks #2315

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/components/highlight-markdown/index.less

@@ -1,3 +1,4 @@
 .text {
+  white-space: pre-wrap; // https://stackoverflow.com/questions/60332183/new-line-with-react-markdown
   .chunkText;
 }