[kubevirt-operator] Fix typo in VMNotRunningFor10Minutes alert

Fix case sensitivity in status check: "running" → "Running".
The metric uses "Running" (capital R), so the lowercase check was
always triggering alerts even for running VMs.

Fixes: https://github.com/cozystack/cozystack/issues/1552

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Aleksei Sviridkin <f@lex.la>
(cherry picked from commit 7fab919e07)

packages/system/kubevirt-operator/alerts/PrometheusRule.yaml

@@ -10,7 +10,7 @@ spec:
       expr: |
         max_over_time(
           kubevirt_vm_info{
-            status!="running",
+            status!="Running",
             exported_namespace=~".+",
             name=~".+"
           }[10m]