Updated readme file to show missing image in related courseware.

Author: callieEDU

Images/image_5.jpg Images/image_5.pngImages/image_5.jpg renamed to Images/image_5.png

@@ -87,7 +87,7 @@ The license for this module is available in the [LICENSE.md](https://github.com/
 # Related Courseware Modules
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 ## [Fourier Analysis](https://www.mathworks.com/matlabcentral/fileexchange/106725-fourier-analysis?s_tid=srchtitle)
-| <img src="Images/image_5.jpeg" width="171" alt="image_5.jpeg"> | **Available on:** <br>[<img src="Images/OpenInFX.png" width="91" alt="OpenInFX.png">](https://www.mathworks.com/matlabcentral/fileexchange/106725-fourier-analysis?s_tid=srchtitle) <br>[<img src="Images/OpenInMO.png" width="136" alt="OpenInMO.png">](https://matlab.mathworks.com/open/github/v1?repo=MathWorks-Teaching-Resources/Fourier-Analysis&project=FourierAnalysis.prj) <br>[GitHub](https://github.com/MathWorks-Teaching-Resources/Fourier-Analysis)   |
+| <img src="Images/image_5.png" width="171" alt="image_5.png"> | **Available on:** <br>[<img src="Images/OpenInFX.png" width="91" alt="OpenInFX.png">](https://www.mathworks.com/matlabcentral/fileexchange/106725-fourier-analysis?s_tid=srchtitle) <br>[<img src="Images/OpenInMO.png" width="136" alt="OpenInMO.png">](https://matlab.mathworks.com/open/github/v1?repo=MathWorks-Teaching-Resources/Fourier-Analysis&project=FourierAnalysis.prj) <br>[GitHub](https://github.com/MathWorks-Teaching-Resources/Fourier-Analysis)   |
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