[gitlab] Fix irker configuration

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

roles/irker/tasks/main.yml

 ---
-- name: Pin irker from bullseye
+- name: Pin irker from Debian unstable
   template:
     src: "apt/{{ item }}.j2"
     dest: "/etc/apt/{{ item }}"
@@ -25,7 +25,7 @@
 - name: Setup Irker parameters
   lineinfile:
     path: /etc/default/irker
-    regexp: "^LAUNCH_AT_STARTUP="
+    regexp: "^IRKER_OPTIONS="
     line: 'IRKER_OPTIONS="-n {{ irker.name }} -d warning"'
     create: true
     owner: root