Re-add smart-shield-callout to cache docs

Author: RebeccaTamachiro

src/content/docs/cache/advanced-configuration/cache-reserve.mdx

@@ -5,6 +5,8 @@ pcx_content_type: concept
 
 import { Render, TabItem, Tabs, APIRequest } from "~/components";
 
+<Render file="smart-shield-callout" product="smart-shield" />
+
 <Render file="cache-reserve-intro" product="cache" />
 
 ![Content served from origin and getting cached in Cache Reserve, and Edge Cache Data Centers (T1=upper-tier, T2=lower-tier) on its way back to the client](~/assets/images/cache/content-being-served.png)

src/content/docs/cache/how-to/tiered-cache.mdx

@@ -20,6 +20,8 @@ Cloudflare allows you to select your cache topology so that you have control ove
 
 ### Smart Tiered Cache
 
+<Render file="smart-shield-callout" product="smart-shield" />
+
 <Render file="smart-tiered-cache" product="cache" />
 
 ### Generic Global Tiered Cache
@@ -28,6 +30,8 @@ Generic Global topology allows for all of Cloudflare’s global data centers to
 
 ### Regional Tiered Cache
 
+<Render file="smart-shield-callout" product="smart-shield" />
+
 <Render file="regional-tiered-cache" product="cache" />
 
 This can help improve performance for **Smart** and **Custom Tiered Cache** topologies with upper-tiers in one or two regions. Regional Tiered Cache is not beneficial for customers with many upper tiers in many regions like Generic Global Tiered Cache.