fix: loop syntax

tasks/configure_home_permissions.yml

 ---
-- name: $HOME-Verzeichnisse von Usern mit gleichen Gruppen schützen
-  block:
-    - name: $HOME-Verzeichnisse sammeln
-      ansible.builtin.find:
-        file_type: directory
-        paths: "/home/"
-        excludes: 'import'
-      register: ls_out
-    - name: striktere Berechtigungen für Homeverzeichnisse setzen
-      ansible.builtin.file:
-        path: "{{ item.path }}/"
-        mode: "0700"
-      loop:
-        # - "{{ ls_out.files | difference(['import','zih']) }}"
-        - "{{ ls_out.files }}"
-      when: item.path not in "import"
+- name: assemble a list of all $HOME directories
+  ansible.builtin.find:
+    file_type: directory
+    paths: "/home/"
+    excludes: 'import'
+  register: ls_out
+
+- name: set stricter permissions to protect $HOME directories from access by users with the same group
+  ansible.builtin.file:
+    path: "{{ item.path }}/"
+    mode: "0700"
+  loop: "{{ ls_out.files }}"
+  # loop: "{{ ls_out.files | difference(['import','zih']) }}"
+  when: not "import" in item.path