Upgrade etcd-backup-restore (#998)

from v0.33.0 to v0.34.0

Author: gardener-robot-ci-2

internal/images/images.yaml

@@ -8,7 +8,7 @@ images:
     name: 'etcdbrctl'
   sourceRepository: github.com/gardener/etcd-backup-restore
   repository: europe-docker.pkg.dev/gardener-project/public/gardener/etcdbrctl
-  tag: "v0.33.0"
+  tag: "v0.34.0"
 - name: alpine
   repository: europe-docker.pkg.dev/gardener-project/public/3rd/alpine
   tag: "3.20.3"