Merge pull request #463 from voxpupuli/drop-ubuntu-18-and-20

Drop Ubuntu 18.04 and 20.04

Author: h-haaks

metadata.json

@@ -78,8 +78,6 @@
     {
       "operatingsystem": "Ubuntu",
       "operatingsystemrelease": [
-        "18.04",
-        "20.04",
         "22.04"
       ]
     }