docs: update UI core index reference

Signed-off-by: Emmanuel Ferdman <[email protected]>

docs/framework/frontend-scripts.mdx

@@ -88,7 +88,7 @@ initial_state.import_script("lodash", "https://cdnjs.cloudflare.com/ajax/libs/lo
 ## Frontend core
 
 <Warning> 
-Effectively using Framework's core can be challenging and will likely entail reading its [source code](https://github.com/writer/writer-framework/blob/master/ui/src/core/index.ts). Furthermore, it's considered an internal capability rather than a public API, so it may unexpectedly change between releases.
+Effectively using Framework's core can be challenging and will likely entail reading its [source code](https://github.com/writer/writer-framework/blob/master/src/ui/src/core/index.ts). Furthermore, it's considered an internal capability rather than a public API, so it may unexpectedly change between releases.
 </Warning>
 You can access Framework's front-end core via `globalThis.core`, unlocking all sorts of functionality. Notably, you can use `getUserState()` to get values from state.