adjusting variable names, fixing errors

tasks/pkgs/cssls.yml

@@ -1,4 +1,16 @@
 # vim: set filetype=yaml.ansible :
+#
+## Package: cssls
+## Description: css language server from vscode
+## AliasFor: vscode-langservers-extracted
 ---
-- name: Pass to vscode-langservers-extracted
-  ansible.builtin.include_tasks: pkgs/vscode-langservers-extracted.yml
+- name: Configure cssls
+  when:
+    - "'cssls' not in __configured"
+  block:
+    - name: Pass to vscode-langservers-extracted
+      ansible.builtin.include_tasks: pkgs/vscode-langservers-extracted.yml
+
+    - name: Finalise cssls configuration
+      ansible.builtin.set_fact:
+        __configured: "{{ __configured | combine( { 'cssls': 'pass to vscode-langservers-extracted' } ) }}"