Oops. Forgot to update the role

roles/inventory/linode/tasks/main.yaml

@@ -1,20 +1,11 @@
 ---
-- name: Fetch Linode instances
-  linode.cloud.linode_instance_info:
-    api_token: "{{ linode_token }}"
-  register: linodes
+- name: Get Linode inventory using local module
+  linode_inventory:
+  register: linode_result
 
-- name: Build inventory lines
-  set_fact:
-    linode_inventory: |
-      {% for linode in linodes.data %}
-      {{ linode.label }} ansible_host={{ linode.ipv4[0] }} {% for tag in linode.tags %}group_{{ tag }}=true {% endfor %}
-      {% endfor %}
-
-- name: Write dynamic inventory to file
+- name: Write inventory to file
   copy:
-    dest: /tmp/linode_inventory.ini
-    content: |
-      [all]
-      {{ linode_inventory }}
+    dest: /tmp/linode_inventory.json
+    content: "{{ linode_result | to_nice_json }}"
+    mode: '0644'