Update: at note about browser refresh behaviour (#728)

* Update: at note on browser refresh behavior

Add note in the caveat section about state resetting when browser refreshed.

* Tweak wording

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Co-authored-by: Debbie Matthews <[email protected]>

Author: janaka

content/develop/api-reference/caching-and-state/session_state.md

@@ -183,6 +183,7 @@ When `runner.enforceSerializableSessionState` is set to `true`, Session State im
 
 ### Caveats and limitations
 
+- Streamlit Session State is tied to a WebSocket connection. When a user reloads the browser tab or navigates using a Markdown link, the WebSocket connection and the associated Session State data are reset.
 - Only the `st.form_submit_button` has a callback in forms. Other widgets inside a form are not allowed to have callbacks.
 - `on_change` and `on_click` events are only supported on input type widgets.
 - Modifying the value of a widget via the Session state API, after instantiating it, is not allowed and will raise a `StreamlitAPIException`. For example: