fix some crashes in documentation

Author: KurtGokhan

src/pages/reference/components/icon.md

@@ -16,12 +16,18 @@ export default function App() {
     <icon>person</icon>
     <icon>add</icon>
     <icon>done_all</icon>
-    <icon style={{ fontSize: 32 }}>language</icon>
-    <icon style={{ fontSize: 96 }}>
+    <icon style={{ fontSize: 48 }}>language</icon>
+    <icon style={{ fontSize: 96, color: 'red' }}>
       keyboard_arrow_down
     </icon>
   </view>;
 };
 ```
 
+```css style.css
+icon {
+  font-size: 32px;
+}
+```
+
 </Sandpack>

src/pages/reference/material/tooltip.md

@@ -6,7 +6,7 @@ layout: API
 <Sandpack>
 
 ```js App.js active
-import { useDataTooltip } from '@reactunity/material';
+import { useDataTooltip, Button } from '@reactunity/material';
 import '@reactunity/material/styles';
 
 export default function App() {