update playbook. dont need default version any more

defaults/main.yml

@@ -1,2 +0,0 @@
----
-debianunattended_debian_version: 13.5.0

tasks/main.yml

@@ -1,4 +1,16 @@
 ---
+- name: query current debian release info
+  uri:
+    url: "https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/SHA256SUMS"
+    return_content: true
+  delegate_to: localhost
+  run_once: true
+  register: debianunattended_sha256sums
+
+- name: determine current debian version
+  set_fact:
+    debianunattended_debian_version: "{{ debianunattended_sha256sums.content | regex_search('debian-([0-9]+\\.[0-9]+\\.[0-9]+)-amd64-netinst\\.iso', '\\1') | first }}"
+
 - name: check if iso exists
   stat:
     path: "{{ playbook_dir }}/debian-{{ debianunattended_debian_version }}-amd64-netinst-unattended-{{ inventory_hostname }}.iso"