update docs

docs/source/examples/gui_examples.md

@@ -1,7 +1,7 @@
 # Alternative GUI's
 
 
-## PyQt5 / PySide6
+## PyQt6 / PyQt5 / PySide6
 
 ```python
 import pandas as pd

docs/source/examples/toolbox.md

@@ -36,7 +36,7 @@ def on_timeframe_selection(chart):
     if new_data.empty:
         return
     # The symbol has not changed, so we want to re-render the drawings.
-    chart.set(new_data, render_drawings=True)  
+    chart.set(new_data, keep_drawings=True)
 
 
 if __name__ == '__main__':