📝 Cache readme and docs update (#2169)

* Update README.md

* update no-store request directive

added cache status unreachable

* Update cache.go

middleware/cache/README.md

@@ -2,9 +2,9 @@
 
 Cache middleware for [Fiber](https://github.com/gofiber/fiber) designed to intercept responses and cache them. This middleware will cache the `Body`, `Content-Type` and `StatusCode` using the `c.Path()` (or a string returned by the Key function) as unique identifier. Special thanks to [@codemicro](https://github.com/codemicro/fiber-cache) for creating this middleware for Fiber core!
 
-Request Directives
-The no-cache request directive will return the up-to-date response but still caches it. You will always get a "miss" cache status.
-The no-store request directive will refrain from caching. You will always get the up-to-date response.
+Request Directives<br>
+`Cache-Control: no-cache` will return the up-to-date response but still caches it. You will always get a `miss` cache status.<br>
+`Cache-Control: no-store` will refrain from caching. You will always get the up-to-date response.
 
 ## Table of Contents