adjust button active time

Author: willmcgugan

src/textual/widgets/_button.py

@@ -204,7 +204,7 @@ def __init__(
 
         self.label = label
         self.variant = variant
-        self.active_effect_duration = 0.3
+        self.active_effect_duration = 0.2
         """Amount of time in seconds the button 'press' animation lasts."""
         if tooltip is not None:
             self.tooltip = tooltip