readme: add Linux Foundation mentorship session about virtme-ng

Add a link to the video from the LF mentorship session on virtme-ng.

Signed-off-by: Andrea Righi <[email protected]>

README.md

@@ -521,6 +521,7 @@ Additional resources
  - [LWN: Faster kernel testing with virtme-ng (November, 2023)](https://lwn.net/Articles/951313/)
  - [LPC 2023: Speeding up Kernel Testing and Debugging with virtme-ng](https://lpc.events/event/17/contributions/1506/attachments/1143/2441/virtme-ng.pdf)
  - [Kernel Recipes 2024: virtme-ng](https://kernel-recipes.org/en/2024/virtme-ng/)
+ - [Linux Foundation Mentorship Session: Speeding Up Kernel Development With virtme-ng](https://www.youtube.com/watch?v=ZgMLGM2UazY)
 
 Credits
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