unbound(role): fix unbound config template

- fix some indentation problems
- fix access control
- fix remote control unix socket and thrust anchor file (because debain
appamour ist annoying)
  - add unbound-anchor package

roles/unbound/tasks/main.yml

@@ -6,6 +6,11 @@
       ansible.builtin.package:
         name: unbound
 
+    - name: install unbound-anchor
+      become: true
+      ansible.builtin.package:
+        name: unbound-anchor
+
     - name: ensure correct directory permissions
       become: true
       ansible.builtin.file: