Added aria-label to button for accessibility

Author: coder-ralph

src/app/generator/repo-tree-generator.tsx

@@ -362,7 +362,7 @@ animate-spin"
                   </Button>
                   <Dialog>
                     <DialogTrigger asChild>
-                      <Button variant="outline" size="icon">
+                      <Button variant="outline" size="icon" aria-label="ASCII Themes Settings">
                         <Settings className="h-4 w-4" />
                       </Button>
                     </DialogTrigger>