fix(new-note-button): Fixed clicking ok in new style pop up

Referencing invalid variable changed to the correct one.

Author: ItsSimko

src/FreeScribe.client/UI/NoteStyleSelector.py

@@ -615,7 +615,7 @@ def ok_clicked(self, is_edit=False):
             self.name_entry.focus_set()
             return
         else:
-            if not is_edit and name in NoteStyleSelector.template_options:
+            if not is_edit and name in NoteStyleSelector.style_options:
                 self.show_error_warning(f"⚠️ Template '{name}' already exists - Please choose a different name")
                 return