Add more recent redhat/centos versions

Johan De Wit · Johan De Wit · commit 44d8fba57869 · 2023-07-10T18:02:31.000+02:00
diff --git a/metadata.json b/metadata.json
@@ -11,13 +11,16 @@
     {
       "operatingsystem": "RedHat",
       "operatingsystemrelease": [
-        "7"
+        "7",
+        "8",
+        "9"
       ]
     },
     {
       "operatingsystem": "CentOS",
       "operatingsystemrelease": [
-        "7"
+        "7",
+        "8"
       ]
     },
     {
