Move `BlobsSidecar`

specs/eip4844/fork-choice.md

@@ -6,6 +6,8 @@
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 
 - [Introduction](#introduction)
+- [Containers](#containers)
+  - [`BlobsSidecar`](#blobssidecar)
 - [Helpers](#helpers)
     - [`validate_blobs_sidecar`](#validate_blobs_sidecar)
     - [`is_data_available`](#is_data_available)
@@ -19,6 +21,18 @@
 
 This is the modification of the fork choice according to the executable beacon chain proposal.
 
+## Containers
+
+### `BlobsSidecar`
+
+```python
+class BlobsSidecar(Container):
+    beacon_block_root: Root
+    beacon_block_slot: Slot
+    blobs: List[Blob, MAX_BLOBS_PER_BLOCK]
+    kzg_aggregated_proof: KZGProof
+```
+
 ## Helpers
 
 #### `validate_blobs_sidecar`

specs/eip4844/p2p-interface.md

@@ -12,7 +12,6 @@ The specification of these changes continues in the same format as the network s
 
   - [Configuration](#configuration)
   - [Containers](#containers)
-    - [`BlobsSidecar`](#blobssidecar)
     - [`SignedBeaconBlockAndBlobsSidecar`](#signedbeaconblockandblobssidecar)
   - [The gossip domain: gossipsub](#the-gossip-domain-gossipsub)
     - [Topics and messages](#topics-and-messages)
@@ -41,16 +40,6 @@ The specification of these changes continues in the same format as the network s
 
 ## Containers
 
-### `BlobsSidecar`
-
-```python
-class BlobsSidecar(Container):
-    beacon_block_root: Root
-    beacon_block_slot: Slot
-    blobs: List[Blob, MAX_BLOBS_PER_BLOCK]
-    kzg_aggregated_proof: KZGProof
-```
-
 ### `SignedBeaconBlockAndBlobsSidecar`
 
 ```python