[cache]Update get-started.mdx (#22575)

Can we use HIT as per docs on Cloudflare cache responses?

https://developers.cloudflare.com/cache/concepts/cache-responses/#hit

Author: nenizera

src/content/docs/cache/get-started.mdx

@@ -41,9 +41,9 @@ Configure your settings to cache static HTML or cache anonymous page views of dy
 * [Understand Origin Cache Control](/cache/concepts/cache-control/)
 * [Cache by device type (Enterprise only)](/cache/how-to/cache-rules/examples/cache-device-type/)
 
-## Improve cache hit rates
+## Improve cache HIT rates
 
-Include or exclude query strings, optimize cache keys, or enable tiered cache to improve hit rates and reduce traffic to your origin.
+Include or exclude query strings, optimize cache keys, or enable tiered cache to improve HIT rates and reduce traffic to your origin.
 
 * [Choose a cache level](/cache/how-to/set-caching-levels/)
 * [Enable Tiered Cache with Argo](/cache/how-to/tiered-cache/#enable-tiered-cache)