opendkim: use su instead of sudo

CHANGELOG.md

@@ -23,6 +23,9 @@
 - replace `Subject` with `[...]` for all outgoing mails.
   ([#481](https://github.com/deltachat/chatmail/pull/481))
 
+- opendkim: use su instead of sudo
+  ([#491](https://github.com/deltachat/chatmail/pull/491))
+
 ## 1.5.0 2024-12-20
 
 - cmdeploy dns: always show recommended DNS records

cmdeploy/src/cmdeploy/__init__.py

@@ -217,8 +217,8 @@ def _configure_opendkim(domain: str, dkim_selector: str = "dkim") -> bool:
             commands=[
                 f"opendkim-genkey -D /etc/dkimkeys -d {domain} -s {dkim_selector}"
             ],
-            _sudo=True,
-            _sudo_user="opendkim",
+            _use_su_login=True,
+            _su_user="opendkim",
         )
 
     return need_restart