Adding FAQ directly under pricing table.

Author: Oxyjun

src/content/docs/kv/platform/pricing.mdx

@@ -10,7 +10,7 @@ import { Render } from "~/components"
 
 <Render file="kv_pricing" product="workers" />
 
-## Pricing
+## Pricing FAQ
 
 ### When writing via KV's [REST API](/api/resources/kv/subresources/namespaces/methods/bulk_update/), how are writes charged?