Update Data-Requirements.md

Signed-off-by: Romain Ruetschi <romain@informal.systems>

docs/spec/relayer/Data-Requirements.md

@@ -12,6 +12,7 @@
   * [`/block_search`](#--block-search-)
   * [`/block_results`](#--block-results-)
   * [`/broadcast_tx_sync`](#--broadcast-tx-sync-)
+  * [`/broadcast_evidence`](#--broadcast-evidence-)
 - [CometBFT WebSocket](#cometbft-websocket)
 
 ## CometBFT RPC
@@ -54,6 +55,10 @@ Used in two situations:
 - To pull the header in the latest block that the application committed, in order to compute the latest app height and app timestamp
 - To get the a block header at a specific/latest height and extract the consensus state from it
 
+### `/latest_commit`, `/commit`, `/validators`
+
+- For the CometBFT light client operations, mainly used to build `LightBlocks` and verify them
+
 ### `/abci_query`
 
 Used in two situations:
@@ -119,6 +124,10 @@ Used in two situations ([diagram for reference](https://app.excalidraw.com/l/4Xq
 
 __Note__: The above list is partly inspired from [cosmos-sdk/#11012](https://github.com/cosmos/cosmos-sdk/issues/11012) but extended and updated.
 
+### `/broadcast_evidence`
+
+- For submitting evidence of a chain misbehaving
+
 ## CometBFT WebSocket
 
 The relayer connects to the node's CometBFT websocket interface and subscribes to the following events: