fix(site): remove flex display from h3 (#744)

Author: RylanBot

packages/site-components/src/styles/docs.less

@@ -227,7 +227,6 @@ div[name="DESIGN"] {
     font-size: 20px;
     line-height: 28px;
     margin: 48px 0 8px;
-    display: flex;
     align-items: center;
     white-space: pre-wrap;