nimbus.prater: , disable discovery for Erigon

It appears peer discovery can be detected by hetzner as an attempt at
network scanning:
https://github.com/ledgerwatch/erigon/issues/7234

Which can lead to the server being shut down.
For this reason I'm lowering max peers and disabling discovery.

Signed-off-by: Jakub Sokołowski <jakub@status.im>

ansible/group_vars/nimbus.prater.yml

@@ -31,8 +31,11 @@ erigon_service_name: 'erigon-{{ erigon_network_name }}-{{ "%02d"|format(idx|int+
 erigon_prune: 'hrtc' # TODO: Possibly wrong, verify.
 erigon_log_level: 'info'
 erigon_cont_mem_ratio: 0.1
+erigon_max_peers: 20
 erigon_miner_enabled: true
 erigon_mining_private_key: '{{lookup("bitwarden", "nimbus/wallet/testnets", field="private-key")}}'
+# Hetzner detects discovery as network scanning.
+erigon_discovery_enabled: false
 # Ports
 erigon_port: '{{ 40303 + (idx|int) + 1 }}'
 erigon_metrics_enabled: true

ansible/requirements.yml

@@ -125,7 +125,7 @@
 
 - name: infra-role-erigon
   src: git@github.com:status-im/infra-role-erigon.git
-  version: 44b4b0629e714de06ae5b36b2235c538d11c0401
+  version: c4057d3cd3f1211db63fc87ebbfcc8cac62b26e5
   scm: git
 
 - name: smart-metrics