MAINTAINERS: Add babrsn to Bluetooth Audio

I have contributed the following PRs:
zephyrproject-rtos/zephyr#80000
zephyrproject-rtos/zephyr#79360
zephyrproject-rtos/zephyr#78846
zephyrproject-rtos/zephyr#78751
zephyrproject-rtos/zephyr#74950
zephyrproject-rtos/zephyr#74946
zephyrproject-rtos/zephyr#73845
zephyrproject-rtos/zephyr#72849

and am attending the weekly LE Audio Zephyr meetings.

Signed-off-by: Babak Arisian <bbaa@demant.com>

Author: babrsn

MAINTAINERS.yml

@@ -463,6 +463,7 @@ Bluetooth Audio:
     - pin-zephyr
     - niym-ot
     - jthm-ot
+    - babrsn
   files:
     - subsys/bluetooth/audio/
     - include/zephyr/bluetooth/audio/