SUMMARY: add Rust MC at LPC 2024 link

Since it has now been announced publicly in the LPC blog [1].

Link: https://lpc.events/blog/current/index.php/2024/05/03/awesome-amount-of-microconference-submissions/ [1]
Signed-off-by: Miguel Ojeda <[email protected]>

Author: ojeda

SUMMARY.md

@@ -80,6 +80,7 @@
 
   - [Kangrejos](https://kangrejos.com)
   - [Linux Plumbers Conference (LPC)](https://lpc.events)
+  - [Rust MC at LPC 2024](https://lpc.events/event/18/sessions/186/)
   - [Rust MC at LPC 2023](https://lpc.events/event/17/sessions/170/)
   - [Rust MC at LPC 2022](https://lpc.events/event/16/sessions/150/)