Update package README for preview1

Author: lukash

package_README.md

@@ -1,4 +1,4 @@
-# Refloat
+# Refloat 1.3 feature preview 1
 
 A full-featured self-balancing skateboard package.
 
@@ -11,7 +11,7 @@ Changelog highlights:
 - Compensation for different motors' torque constant (6.06+)
 - Setpoint smoothing for all tilts (Torque Tilt, ATR, Turn Tilt, Brake Tilt, Remote)
 
-For more details, read the [1.3 release post]().
+For more details, read the [1.3-preview1 release post]().
 
 ## Installation
 ### Upgrading