README: add Stop Forrest Stop Footer like the upstream project has

Previously this file did not have a footer because it was just too short
now it is long enough to have one.

Signed-off-by: Leonard Göhrs <[email protected]>

Author: hnez

README.md

@@ -68,4 +68,12 @@ See the [workflow file](.github/workflows/debian.yaml) for more information.
 Refer to the [Forrest][forrest-project] documentation for information on how
 actually to use these machine images.
 
+---
+
+                                        ┏━━━━━━━━━━━━━━┓
+                                        ┃     Stop     ┃
+                                        ┃    Forrest   ┃
+                                        ┃     Stop     ┃
+                                        ┗━━━┯━━━━━━┯━━━┛
+
 [forrest-project]: https://github.com/forrest-runner/forrest/