fix(helm): changed default values

deployments/helm/values.yaml

@@ -8,7 +8,7 @@ node:
   concurrentFgRequests: 50
 
 # Ethereum node URL. A value for this variable is mandatory.
-base_layer_node_url: https://base_url.example.com
+base_layer_node_url:
 
 starknet:
   # possible values: "mainnet.json, sepolia_testnet" and "sepolia_integration".
@@ -93,7 +93,7 @@ service:
 # Persistent volume claim variables for a papyrus pod.
 pvc:
   # Recommended size is at least 512Gi.
-  size: 1Gi
+  size: 512Gi
   # Is is recommended to use an SSD volume (such as GKE premium-rwo).
   storageClass: ""
   # Use an existing snapshot for the node's data. The kubernetes volumesnapshot object should