chore(system-upgrade): Rename plan and allow for F39

infrastructure/system-upgrades/fedora.yaml

@@ -21,7 +21,7 @@ stringData:
 apiVersion: upgrade.cattle.io/v1
 kind: Plan
 metadata:
-  name: fedora-35-latest
+  name: fedora-dnf-upgrade
   namespace: system-upgrade
 spec:
   concurrency: 1
@@ -40,6 +40,7 @@ spec:
         values:
           - "37"
           - "38"
+          - "39"
   serviceAccountName: system-upgrade
   secrets:
     - name: fedora-dnf-upgrade