Fix worker inflight tasks heading (#2177)

Author: palfrey

web/platform/src/content/docs/docs/config/production-config.mdx

@@ -468,6 +468,8 @@ the disk and block the async runtime if too many happen at once.
   // Set to 0 for unlimited.
   "max_concurrent_writes": 16
 }
+```
+
 ## Limit Worker Inflight Tasks
 
 If your workers are getting saturated, cap the number of concurrent tasks they
@@ -486,7 +488,6 @@ workers: [{
 }]
 ```
 
-
 ## Speed Up NativeLink by Turning Off a Hidden Redis Query
 
 If you're running NativeLink at scale and noticing Redis performance bottlenecks, there's a configuration option that can significantly reduce load on your Redis scheduler: disabling the worker match logging interval.