Fix ansible-lint-reported errors

roles/custom/matrix-bot-go-neb/tasks/main.yml

@@ -12,6 +12,3 @@
   tags:
     - setup-all
     - setup-bot-go-neb
-
-
-

roles/custom/matrix-synapse/tasks/synapse/workers/setup_install.yml

@@ -7,7 +7,7 @@
     use_regex: true
   register: matrix_synapse_workers_current_config_files
 
-- set_fact:
+- ansible.builtin.set_fact:
     matrix_synapse_enabled_worker_names: "{{ matrix_synapse_workers_enabled_list | map(attribute='name') }}"
 
 # This also deletes some things which we need. They will be recreated below.