MAINTAINERS: Add rugeGerritsen to BT host and ISO as collaborator

Add Rubin Gerritsen as collaborator to the BT host and BT ISO.
He has been very active in these areas.
See for more info:
zephyrproject-rtos#80233

List the host collaborators in alphabetical order while at it.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

MAINTAINERS.yml

@@ -359,8 +359,9 @@ Bluetooth Host:
     - alwa-nordic
   collaborators:
     - hermabe
-    - Thalley
+    - rugeGerritsen
     - sjanc
+    - Thalley
     - theob-pro
   files:
     - doc/connectivity/bluetooth/
@@ -506,6 +507,7 @@ Bluetooth ISO:
   collaborators:
     - jhedberg
     - kruithofa
+    - rugeGerritsen
   files:
     - include/zephyr/bluetooth/iso.h
     - doc/connectivity/bluetooth/api/shell/iso.rst