Fix garbled blob_kzg_commitments accesses

Author: jtraglia

specs/_features/eip7732/p2p-interface.md

@@ -130,7 +130,7 @@ The *type* of the payload of this topic changes to the (modified) `SignedBeaconB
 
 There are no new validations for this topic. However, all validations with regards to the `ExecutionPayload` are removed:
 
-- _[REJECT]_ The length of KZG commitments is less than or equal to the limitation defined in Consensus Layer -- i.e. validate that len(body.signed_beacon_block.message.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK
+- _[REJECT]_ The length of KZG commitments is less than or equal to the limitation defined in Consensus Layer -- i.e. validate that `len(signed_beacon_block.message.body.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK`
 - _[REJECT]_ The block's execution payload timestamp is correct with respect to the slot
        -- i.e. `execution_payload.timestamp == compute_timestamp_at_slot(state, block.slot)`.
 - If `execution_payload` verification of block's parent by an execution node is *not* complete:

specs/deneb/p2p-interface.md

@@ -147,7 +147,7 @@ The *type* of the payload of this topic changes to the (modified) `SignedBeaconB
 New validation:
 
 - _[REJECT]_ The length of KZG commitments is less than or equal to the limitation defined in Consensus Layer --
-  i.e. validate that `len(body.signed_beacon_block.message.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK`
+  i.e. validate that `len(signed_beacon_block.message.body.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK`
 
 ###### `beacon_aggregate_and_proof`
 

specs/electra/p2p-interface.md

@@ -67,7 +67,7 @@ The derivation of the `message-id` remains stable.
 *Updated validation*
 
 - _[REJECT]_ The length of KZG commitments is less than or equal to the limitation defined in Consensus Layer --
-  i.e. validate that `len(body.signed_beacon_block.message.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK_ELECTRA`
+  i.e. validate that `len(signed_beacon_block.message.body.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK_ELECTRA`
 
 ###### `beacon_aggregate_and_proof`
 

specs/fulu/p2p-interface.md

@@ -174,7 +174,7 @@ Some gossip meshes are upgraded in the Fulu fork to support upgraded types.
 *Updated validation*
 
 - _[REJECT]_ The length of KZG commitments is less than or equal to the limitation defined in Consensus Layer --
-  i.e. validate that `len(body.signed_beacon_block.message.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK_FULU`
+  i.e. validate that `len(signed_beacon_block.message.body.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK_FULU`
 
 ##### Blob subnets