Update actions.mdx change "caching" to "functionality" (#1191)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: klequis

src/routes/solid-router/concepts/actions.mdx

@@ -44,7 +44,7 @@ The `echo` action will act as a backend, however, it can be substituted for any
 Typically, route actions are used with some sort of solution like fetch or GraphQL.
 
 :::tip
-In [SolidStart](/solid-start) apps, it's recommended to use the [`"use server"`](/solid-start/reference/server/use-server) directive to leverage server-side caching.
+In [SolidStart](/solid-start) apps, it's recommended to use the [`"use server"`](/solid-start/reference/server/use-server) directive to leverage server-side functionality.
 :::
 
 ### Using actions