metadata.json: drop EOL Ubuntu 18.04, add Ubuntu 20.04 and 22.04

kenyon · kenyon · commit 5bcce9cd028e · 2023-10-22T16:52:15.000-07:00
diff --git a/metadata.json b/metadata.json
@@ -40,7 +40,8 @@
     {
       "operatingsystem": "Ubuntu",
       "operatingsystemrelease": [
-        "18.04"
+        "20.04",
+        "22.04"
       ]
     },
     {
