Update README.md

Author: barthba

README.md

@@ -56,7 +56,7 @@ The links in this section are to labs which walk you through working with the va
 [Power Components](/lessons/assembly/power.md)  
 [Pico and Chassis Together](/lessons/assembly/plate_chassis.md)  
 [Tail Tip/Photoresistor](/lessons/assembly/tail.md)  
-[Tail Connection](/lessons/assembly/tail_chassis.md)
+[Tail Connection](/lessons/assembly/tail_chassis.md)  
 [Head and RGB Leds](/lessons/assembly/head.md)