chore: Update callouts.mdx (#451)

Co-authored-by: Devin Logan <[email protected]>

Author: Ryan-Amirthan

fern/products/docs/pages/component-library/default-components/callouts.mdx

@@ -77,10 +77,10 @@ This Callout uses a title and a custom icon.
 
 ### Error callouts
 
-<e>This indicates a potential error</e>
+<Error>This indicates a potential error</Error>
 
 ```jsx
-<e>This indicates a potential error</e>
+<Error>This indicates a potential error</Error>
 ```
 
 ### Info callouts
@@ -91,6 +91,15 @@ This Callout uses a title and a custom icon.
 <Info>This draws attention to important information</Info>
 ```
 
+### Launch callouts
+
+<Launch>This celebrates a product launch or other announcement</Launch>
+
+```jsx
+<Launch>This celebrates an announcement</Launch>
+```
+
+
 ### Tip callouts
 
 <Tip>This suggests a helpful tip</Tip>