roles/resolved: use stub-resolv.conf

We want to route all queries through a single per-system resolver
rather than applications doing their own black magic with upstream
servers in /resolv.conf. In particular, without this, curl was adding
a search domain to a fully qualified domain, naturally yielding an
"unresolveable" domain that was calculated incorrectly.

Signed-off-by: John Helmert III <jchelmert3@posteo.net>

roles/resolved/tasks/resolved.yml

@@ -1,7 +1,7 @@
 ---
 - name: Link resolv.conf to resolved's stub
   ansible.builtin.file:
-    src: /run/systemd/resolve/resolv.conf
+    src: /run/systemd/resolve/stub-resolv.conf
     dest: /etc/resolv.conf
     owner: systemd-resolve
     group: systemd-resolve