add rocky and almalinux 8 and 9; add centos 9

Author: zilchms

metadata.json

@@ -15,7 +15,8 @@
       "operatingsystem": "CentOS",
       "operatingsystemrelease": [
         "7",
-        "8"
+        "8",
+        "9"
       ]
     },
     {
@@ -34,6 +35,20 @@
         "9"
       ]
     },
+    {
+      "operatingsystem": "AlmaLinux",
+      "operatingsystemrelease": [
+        "8",
+        "9"
+      ]
+    },
+    {
+      "operatingsystem": "Rocky",
+      "operatingsystemrelease": [
+        "8",
+        "9"
+      ]
+    },
     {
       "operatingsystem": "Scientific",
       "operatingsystemrelease": [