updated tasks so they are only run once

tasks/pkgs/yamlls.yml

@@ -1,8 +1,16 @@
 # vim: set filetype=yaml.ansible :
 ---
-- name: Add to pkg_npm
-  notify:
-    - Depend node
-  changed_when: true
-  ansible.builtin.set_fact:
-    pkg_npm: "{{ pkg_npm + ['yaml-language-server'] }}"
+- name: Add yamlls
+  when:
+    - yamlls_configured is undefined
+  block:
+    - name: Add to pkg_npm
+      notify:
+        - Depend node
+      changed_when: true
+      ansible.builtin.set_fact:
+        pkg_npm: "{{ pkg_npm + ['yaml-language-server'] }}"
+
+    - name: Set yamlls_configured
+      ansible.builtin.set_fact:
+        yamlls_configured: true