fix(rename): type onSave as void | Promise<unknown> so fire-and-forget call sites pass the build

table-grid's optimistic column rename is a block-bodied callback returning
void, which is only assignable when the declared return type is literally
void — 'undefined | Promise<unknown>' rejected it and failed the Next.js
type check in CI.

Author: emir-karabeg

apps/sim/hooks/use-inline-rename.ts

@@ -9,7 +9,7 @@ interface UseInlineRenameProps {
    * `mutateAsync(...)`) — NOT a fire-and-forget `mutate(...)` — so `isSaving`
    * spans the in-flight request and a rejection can revive the edit session.
    */
-  onSave: (id: string, newName: string) => undefined | Promise<unknown>
+  onSave: (id: string, newName: string) => void | Promise<unknown>
 }
 
 /**