Use fully-qualified module names for builtin Ansible modules

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1939

roles/matrix-client-element/tasks/prepare_themes.yml

@@ -6,7 +6,7 @@
 
 - block:
   - name: Ensure Element themes repository is pulled
-    git:
+    ansible.builtin.git:
       repo: "{{ matrix_client_element_themes_repository_url }}"
       dest: "{{ role_path }}/files/scratchpad/themes"
 
@@ -18,13 +18,13 @@
     register: matrix_client_element_theme_file_list
 
   - name: Read Element theme
-    slurp:
+    ansible.builtin.slurp:
       path: "{{ item.path }}"
     register: "matrix_client_element_theme_file_contents"
     with_items: "{{ matrix_client_element_theme_file_list.files }}"
 
   - name: Load Element theme
-    set_fact:
+    ansible.builtin.set_fact:
       matrix_client_element_settingDefaults_custom_themes: "{{ matrix_client_element_settingDefaults_custom_themes + [item['content'] | b64decode | from_json] }}"
     with_items: "{{ matrix_client_element_theme_file_contents.results }}"
 
@@ -39,7 +39,7 @@
 #
 
 - name: Ensure Element themes repository is removed
-  file:
+  ansible.builtin.file:
     path: "{{ role_path }}/files/scratchpad/themes"
     state: absent
   run_once: true