Capitalize "Actions" as a React concept in documentation

Addresses #6713 - capitalizes "actions" to "Actions" where it refers
to the React Actions concept in hooks.md and server-functions.md.

Author: GalacticAvenger

src/content/reference/react/hooks.md

@@ -116,7 +116,7 @@ These Hooks are mostly useful to library authors and aren't commonly used in the
 - [`useDebugValue`](/reference/react/useDebugValue) lets you customize the label React DevTools displays for your custom Hook.
 - [`useId`](/reference/react/useId) lets a component associate a unique ID with itself. Typically used with accessibility APIs.
 - [`useSyncExternalStore`](/reference/react/useSyncExternalStore) lets a component subscribe to an external store.
-* [`useActionState`](/reference/react/useActionState) allows you to manage state of actions.
+* [`useActionState`](/reference/react/useActionState) allows you to manage state of Actions.
 
 ---
 

src/content/reference/rsc/server-functions.md

@@ -6,7 +6,7 @@ title: Server Functions
 
 Server Functions are for use in [React Server Components](/reference/rsc/server-components).
 
-**Note:** Until September 2024, we referred to all Server Functions as "Server Actions". If a Server Function is passed to an action prop or called from inside an action then it is a Server Action, but not all Server Functions are Server Actions. The naming in this documentation has been updated to reflect that Server Functions can be used for multiple purposes.
+**Note:** Until September 2024, we referred to all Server Functions as "Server Actions". If a Server Function is passed to an action prop or called from inside an Action then it is a Server Action, but not all Server Functions are Server Actions. The naming in this documentation has been updated to reflect that Server Functions can be used for multiple purposes.
 
 </RSC>