Rename inject_into_nginx_proxy.yml to init.yml when it does more than injection

roles/custom/matrix-synapse/tasks/main.yml

@@ -2,7 +2,7 @@
 
 - block:
     - when: matrix_synapse_enabled | bool
-      ansible.builtin.include_tasks: "{{ role_path }}/tasks/inject_into_nginx_proxy.yml"
+      ansible.builtin.include_tasks: "{{ role_path }}/tasks/init.yml"
   tags:
     - setup-all
     - setup-synapse