Update Signal panel description

jdufresne · jdufresne · commit 646bcab0367c · 2020-10-15T19:06:55.000-07:00
Since fb7c000 the panel no longer displays args (as they were deprecated upstream).
diff --git a/docs/panels.rst b/docs/panels.rst
@@ -90,7 +90,7 @@ Signal
 
 Path: ``debug_toolbar.panels.signals.SignalsPanel``
 
-List of signals, their args and receivers.
+List of signals and receivers.
 
 Logging
 ~~~~~~~
