Update .app files (#2239)

Co-authored-by: GitHub Actions <github-actions[bot]@users.noreply.github.com>

Author: community-scripts-pr-app[bot]

ct/headers/proxmox-mail-gateway

@@ -0,0 +1,6 @@
+    ____                                             __  ___      _ __      ______      __                          
+   / __ \_________  _  ______ ___  ____  _  __      /  |/  /___ _(_) /     / ____/___ _/ /____ _      ______ ___  __
+  / /_/ / ___/ __ \| |/_/ __ `__ \/ __ \| |/_/_____/ /|_/ / __ `/ / /_____/ / __/ __ `/ __/ _ \ | /| / / __ `/ / / /
+ / ____/ /  / /_/ />  </ / / / / / /_/ />  </_____/ /  / / /_/ / / /_____/ /_/ / /_/ / /_/  __/ |/ |/ / /_/ / /_/ / 
+/_/   /_/   \____/_/|_/_/ /_/ /_/\____/_/|_|     /_/  /_/\__,_/_/_/      \____/\__,_/\__/\___/|__/|__/\__,_/\__, /  
+                                                                                                           /____/