[Rules] Update index.mdx (#17879)

Hello team, 

"Cache Rules" per product name.

Thanks!

Author: nenizera

src/content/docs/cache/how-to/cache-rules/index.mdx

@@ -22,5 +22,5 @@ The following table describes Cache Rules availability per plan.
 <Render
 	file="troubleshoot-rules-with-trace"
 	product="rules"
-	params={{ one: "cache rules" }}
+	params={{ one: "Cache Rules" }}
 />