Update image source in problem.md

Author: pavly-gerges

system-design/problem.md

@@ -204,7 +204,7 @@ $$
 
 * Software Architectural Design of the involved subsystems and components:
 
-<img src="solution-design.svg">
+<img src="https://github.com/RoboJoint-Team/RoboJoint-Exo/blob/main/system-design/assets/solution-design.svg">
 
 ### References
 1) [Harrison's Principles of Medicine $20^{th}$ edition](https://accessmedicine.mhmedical.com/content.aspx?bookId=2129&sectionId=159213747)
@@ -213,4 +213,4 @@ $$
 4) [Applied Linear Algebra, Springer](https://link.springer.com/book/10.1007/978-3-319-91041-3)
 5) [Handbook of Mathematics, Springer](https://link.springer.com/book/10.1007/978-3-662-46221-8)
 6) [Spinal Cord Injuries](https://www.ncbi.nlm.nih.gov/books/NBK560721/)
-7) [Medical and Biological Engineering and Computing: Use of cardan angles to locate rigid bodies in three-dimensional space](https://link.springer.com/article/10.1007/BF02441745)
+7) [Medical and Biological Engineering and Computing: Use of cardan angles to locate rigid bodies in three-dimensional space](https://link.springer.com/article/10.1007/BF02441745)