MAINTAINERS: update hal_silabs maintainers

This comits updates the maintainers and collaborators lists for the
hal_silabs area.

Signed-off-by: Filip Kokosinski <[email protected]>

Author: fkokosinski

MAINTAINERS.yml

@@ -2347,8 +2347,11 @@ West:
     - manifest-hal_rpi_pico
 
 "West project: hal_silabs":
-  status: odd fixes
+  status: maintained
+  maintainers:
+    - fkokosinski
   collaborators:
+    - sateeshkotapati
     - yonsch
     - mnkp
   files: