add ur bot

topics/04_mechanical/index.md

@@ -71,7 +71,6 @@ Bridge Coordinate Measuring Machines (CMM)
 Passive Robot Arm<br>
 <img src="images/portable_robot_arm.png" alt="Portable Robot Arm">
 
-
 <img src="images/gage_faro_arm.png" alt="Gage Faro Arm"><br>
 
 
@@ -81,6 +80,7 @@ Fixed Coordinate Measuring Machines (CMMs) excel in providing extreme precision,
 ### DIY
 
 Universal Robots
+<img src="images/universal_robot.jpg" alt="Universal Robot"><br>