Update docs/state_structure/component_state.md

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

Author: LineIndent

docs/state_structure/component_state.md

@@ -83,6 +83,7 @@ class EditableText(rx.ComponentState):
     original_text: str
     editing: bool = False
 
+    @rx.event
     def set_text(self, value: str):
         self.text = value