Merge pull request #3772 from nalepae/patch-3

EIP-7594 - Update ENR record

Author: hwwhww

specs/_features/eip7594/p2p-interface.md

@@ -28,7 +28,7 @@
       - [DataColumnSidecarsByRange v1](#datacolumnsidecarsbyrange-v1)
   - [The discovery domain: discv5](#the-discovery-domain-discv5)
     - [ENR structure](#enr-structure)
-      - [`custody_subnet_count`](#custody_subnet_count)
+      - [Custody subnet count](#custody-subnet-count)
 
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@@ -284,10 +284,10 @@ After the initial data column sidecar, clients MAY stop in the process of respon
 
 #### ENR structure
 
-##### `custody_subnet_count`
+##### Custody subnet count
 
-A new field is added to the ENR under the key `custody_subnet_count` to facilitate custody data column discovery.
+A new field is added to the ENR under the key `csc` to facilitate custody data column discovery.
 
-| Key                    | Value        |
-|:-----------------------|:-------------|
-| `custody_subnet_count` | SSZ `uint64` |
+| Key   | Value                                    |
+|:------|:-----------------------------------------|
+| `csc` | Custody subnet count, big endian integer |