Apply suggestion from @coolguyzone

Co-authored-by: Alex Krawiec <[email protected]>

Author: codyde

docs/platforms/javascript/common/tracing/span-metrics/examples.mdx

@@ -174,7 +174,7 @@ app.post('/api/checkout', async (req: Request, res: Response) => {
 
 Example Repository: [SnapTrace](https://github.com/getsentry/snaptrace-tracing-example)
 
-**Challenge:** Track user-perceived upload time, server-side validation, and async media processing (optimization, thumbnail generation) while maintaining trace continuity across async boundaries.
+**The Challenge:** Track user-perceived upload time, server-side validation, and async media processing (optimization, thumbnail generation) while maintaining trace continuity across async boundaries.
 
 **The Solution:** Start a client span for the entire upload experience, create a backend span for upload validation, and another span for async media processing. Use rich attributes instead of excessive spans to capture processing details.