fix: update snippet enabling logic for Proxmox storage configuration

tasks/preflight-checks.yml

@@ -160,13 +160,10 @@
 - name: "[PREFLIGHT] Ensure Proxmox storage supports snippets"
   block:
     - name: "[PREFLIGHT] Ensure 'snippets' is enabled for {{ proxmox_snippets_storage }}"
-      ansible.builtin.lineinfile:
+      ansible.builtin.replace:
         path: /etc/pve/storage.cfg
-        regexp: '^(\s*content\s+.*)(?<!snippets)$'
-        line: '\1,snippets'
-        backrefs: yes
-        # Limit the match to lines following the correct storage ID
-        insertafter: "^dir: {{ proxmox_snippets_storage }}$"
+        regexp: '(dir:\s*{{ proxmox_snippets_storage }}[\s\S]*?content\s+)(.*)(?<!snippets)'
+        replace: '\1\2,snippets'
         
     - name: "[PREFLIGHT] Ensure snippets storage directory exists"
       ansible.builtin.file: