fix empty lines

Author: housa

docs/hardware_ready/ADRs/virtualisation.md

@@ -3,12 +3,10 @@ title: "Virtualisation"
 date: "2025-07-08"
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 | status: | date: | decision-makers: |
 | --- | --- | --- |
 | proposed | 2025-07-08 | Alexandra Aldershaab |
 
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 ## Context and Problem Statement
 
 One important aspect is to determine whether the clusters should run on an OS directly on the machines, or if it makes sense to add a virtualisation layer.