Update README.md

Author: kathyz95

Classroom Challenge Projects/Projects/README.md

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 <td><img src="https://gist.githubusercontent.com/robertogl/e0115dc303472a9cfd52bbbc8edb7665/raw/QuadcopterDrone.jpg"  width=500 /></td>
 <td><p><h2><a href="https://github.com/mathworks/MATLAB-Simulink-Challenge-Project-Hub/tree/main/Classroom%20Challenge%20Projects/Projects/Drone%20Payload%20Capacity%20and%20Structural%20Design%20Analysis">Drone Payload Capacity and Structural Design Analysis</a></h2></p>
 <p>Test different drone arm designs and materials to maximize payload capacity while maintaining structural integrity by performing thrust-to-weight analysis and finite element analysis in MATLAB.</p>
-<p><strong>Skills Gained: </strong>Drone structural design, thrust-to-weight analysis, payload capacity estimation, finite element analysis, CAD (optional)</p>
+<p><strong>Skills Gained: </strong>Drone structural design, thrust-to-weight analysis, payload capacity estimation, finite element analysis, CAD </p>
 <p><strong>Suggested Courses where Project can be used:</strong> Physics I (Mechanics), Statics, Introduction to Engineering Design, Differential Equations, Introduction to CAD, Introductory Aerospace or Robotics Engineering</p>
 <p><strong>Estimated Time to Complete</strong> (teams of 4, excluding tutorial self-study time): 30-40 hours</p></td>
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