Update Helm release metrics-server to v3.12.0

Signed-off-by: Renovate Bot <[email protected]>

Author: vshn-renovate

class/defaults.yml

@@ -4,7 +4,7 @@ parameters:
     charts:
       metrics-server:
         source: https://kubernetes-sigs.github.io/metrics-server
-        version: '3.8.2'
+        version: '3.12.0'
     images:
       metrics_server:
         image: registry.k8s.io/metrics-server/metrics-server