add note about edx

[karlhorky]

Thanks @KarthikSiddarth! Can you add:

• a newline using the \ character at the end of the line
• the topics taught on the next line

You can take a look at the other entries to see how it's done.

Apart from that, if you could make your description text less like marketing text (short, objective statements), that would be great. Otherwise I can try to do this.

[karthik-durai]

@karlhorky made changes

[karlhorky]

Thanks @KarthikSiddarth! Made the marketing language changes, now merging!