Update README.md

Author: Saibot393

README.md

@@ -40,6 +40,9 @@ Since v2.13.0 Rideable also has a feature for Token following.
 - Adjust rider size: to reduce the size of riders should their size be greater or equal to the size of the ridden token
 - Adjusted rider size factor: to set the factor by which the size of riders of smaller tokens is adjusted
 - Rider scale factor: to scale the graphics of riders
+- Mounting weight: to add an Item to ridden tokens that represents the weight of the riding tokens
+- Initiative link: to link the initiative of the mounts to their riders
+- Speed adjustment: to adjust the speed of riders to represent the speed of their mounts
 - Rider movement default setting: to set the default Rider movement behaviour for new players
 - Mount button default position: to set the world default position for the mount button
 - Enable Token following: to use the Token following feature