Update quay.io/oauth2-proxy/oauth2-proxy Docker tag to v7.12.0

Signed-off-by: Renovate Bot <tech+renovate@vshn.ch>

Author: vshn-renovate

class/defaults.yml

@@ -17,7 +17,7 @@ parameters:
       oauth2Proxy:
         registry: quay.io
         image: oauth2-proxy/oauth2-proxy
-        tag: v7.9.0
+        tag: v7.12.0
 
     # Map the Kubernetes version to the correct kube-prometheus version
     =_kube_prometheus_version: