Fix st.query_params error

multiapp.py

@@ -3,7 +3,7 @@
 
 import streamlit as st
 
-# app_state = st.query_params
+# app_state = st.experimental_get_query_params()
 # app_state = {k: v[0] if isinstance(v, list) else v for k, v in app_state.items()} # fetch the first item in each query string as we don't have multiple values for each query string key in this example
 
 
@@ -42,7 +42,7 @@ class MultiApp:
         self.apps.append({"title": title, "function": func})
 
     def run(self):
-        app_state = st.query_params
+        app_state = st.experimental_get_query_params()
         app_state = {
             k: v[0] if isinstance(v, list) else v for k, v in app_state.items()
         }  # fetch the first item in each query string as we don't have multiple values for each query string key in this example

streamlit_app.py

@@ -33,7 +33,7 @@ apps = {
 
 titles = [app["title"] for app in apps.values()]
 icons = [app["icon"] for app in apps.values()]
-params = st.query_params
+params = st.experimental_get_query_params()
 
 if "page" in params:
     default_index = int(titles.index(params["page"][0].lower()))