Update MAINTAINERS.md

The maintainers file had last been updated 2 years ago.
This commit removes all maintainers who have left the team since then,
and adds those we joined in the meantime.

Signed-off-by: Patrick Roy <[email protected]>

Author: roypat

MAINTAINERS.md

@@ -2,14 +2,18 @@
 
 Firecracker is maintained by a dedicated team within Amazon:
 
-- Adrian Catangiu <[email protected]>
-- Alexandru Cihodaru <[email protected]>
-- Alin Dima <[email protected]>
-- Andrei Sandu <[email protected]>
+- Alexandra Iordache <[email protected]>
+- Alexandru-Cezar Sardan <[email protected]>
+- Andrei-Cristian Traistaru <[email protected]>
+- Anton Fabian Patras <[email protected]>
+- Babis Chalios <[email protected]>
 - Diana Popa <[email protected]>
-- Gabriel Ionescu <[email protected]>
-- George Pisaltu <[email protected]>
-- Iulian Barbu <[email protected]>
-- Liviu Berciu <[email protected]>
+- Jonathan Woollett-Light <[email protected]>
 - Luminita Voicu <[email protected]>
-- Serban Iorga <[email protected]>
+- Marco Cali <[email protected]>
+- Matthew Schlebush <[email protected]>
+- Nikita Kalyazin <[email protected]>
+- Pablo Barbachano <[email protected]>
+- Patrick Roy <[email protected]>
+- Takahiro Itazuri <[email protected]>
+- Vibha Acharya <[email protected]>