[China Network] Update available features with LB (#19135)

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Co-authored-by: Pedro Sousa <[email protected]>

Author: bjin-cloudflare

src/content/docs/china-network/reference/available-products.mdx

@@ -23,6 +23,7 @@ The following products and features are available on the Cloudflare China Networ
 | [Bot Management](/bots/)                   | Bot detection and mitigation                                 | Provides bot identification and protection for a domain. Only supports certain Machine Learning (ML) models.                                             |
 | [Argo Smart Routing](/argo-smart-routing/) | Layer 7 smart routing                                        | Layer 7 (application layer) traffic smart-routed more efficiently to origin.                                                                             |
 | [Rules](/rules/)                           | All rules products, except [Snippets](/rules/snippets/)      | Make adjustments to requests and responses, configure Cloudflare settings, and trigger specific actions for matching requests.                           |
+| [Load Balancing](/load-balancing/)         | Full features                                                | Maximize application performance and availability.                                                                                                       |
 
 ## Developer services