updated tasks so they are only run once

tasks/pkgs/ansible_ls.yml

@@ -0,0 +1,16 @@
+# vim: set filetype=yaml.ansible :
+---
+- name: Add ansible_ls
+  when:
+    - ansible_ls_configured is undefined
+  block:
+    - name: Add to pkg_npm
+      notify:
+        - Depend node
+      changed_when: true
+      ansible.builtin.set_fact:
+        pkg_npm: "{{ pkg_npm + ['@ansible/ansible-language-server'] }}"
+
+    - name: Set ansible_ls_configured
+      ansible.builtin.set_fact:
+        ansible_ls_configured: true