upgrade debian packages on "cmdeploy run"

CHANGELOG.md

@@ -3,6 +3,9 @@
 ## untagged
 
 
+- trigger "apt upgrade" during "cmdeploy run" 
+  ([#398](https://github.com/deltachat/chatmail/pull/398))
+
 ## 1.4.1 2024-07-31
 
 - fix metadata dictproxy which would confuse transactions

cmdeploy/src/cmdeploy/__init__.py

@@ -489,6 +489,7 @@ def deploy_chatmail(config_path: Path) -> None:
     )
 
     apt.update(name="apt update", cache_time=24 * 3600)
+    apt.upgrade(name="upgrade apt packages", auto_remove=True)
 
     apt.packages(
         name="Install rsync",