Fix typo

Author: cpsievert

tests/playwright/shiny/components/chat/icon/app.py

@@ -82,7 +82,7 @@ async def handle_user_input_svg(user_input: str):
     with ui.div():
         ui.h2("Image Bot")
         chat_image.ui(
-            messsages=["Hello! I'm Image Bot. How can I help you today?"],
+            messages=["Hello! I'm Image Bot. How can I help you today?"],
             icon_assistant=ui.img(
                 src="img/grace-hopper.jpg",
                 class_="icon-image grace-hopper",