fix: ensure 'snippets' is enabled for Proxmox storage configuration

tasks/preflight-checks.yml

@@ -159,22 +159,14 @@
 
 - name: "[PREFLIGHT] Ensure Proxmox storage supports snippets"
   block:
-    - name: "[PREFLIGHT] Ensure 'snippets' is in the content list for {{ proxmox_snippets_storage }}"
+    - name: "[PREFLIGHT] Ensure 'snippets' is enabled for {{ proxmox_snippets_storage }}"
       ansible.builtin.lineinfile:
         path: /etc/pve/storage.cfg
         insertafter: "^dir: {{ proxmox_snippets_storage }}$"
-        regexp: "^(\\s*content\\s+)(.*)$"
-        line: '\1{{ (storage_content.split(",") | union(["snippets"])) | join(",") }}'
+        regexp: '^(\\s*content\\s+)(.*)(?<!snippets)$'
+        line: '\1\2,snippets'
         backrefs: yes
-      vars:
-        storage_content: >-
-          {{ lookup('ansible.builtin.lines', '/etc/pve/storage.cfg')
-             | select('match', '^\\s*dir: {{ proxmox_snippets_storage }}')
-             | list
-             | map('regex_search', '^\\s*content\\s+(.*)$')
-             | select('string')
-             | first
-             | default('') }}
+      become: true
 
     - name: "[PREFLIGHT] Ensure snippets storage directory exists"
       ansible.builtin.file: