Update kvm-exporter Docker tag to v0.3.12

Author: renovate[bot]

kvm-exporter/plugindefinition.yaml

@@ -6,15 +6,15 @@ kind: PluginDefinition
 metadata:
   name: kvm-exporter
 spec:
-  version: 0.3.11
+  version: 0.3.12
   displayName: KVM Exporter
   description: Metrics exporter for KVM hypervisors.
   docMarkDownUrl: https://raw.githubusercontent.com/cobaltcore-dev/greenhouse-extensions/kvm-exporter/main/README.md
   icon: https://raw.githubusercontent.com/cobaltcore-dev/greenhouse-extensions/kvm-exporter/main/logo.png
   helmChart:
     name: kvm-exporter
     repository: oci://ghcr.io/cobaltcore-dev/kvm-exporter/charts
-    version: 0.3.11
+    version: 0.3.12
   options:
     - name: serviceMonitorLabels
       displayName: Extra Service Monitor Labels