deprecate block mode in proto (Finschia#923)

* feat: deprecate block mode in proto

* add changelog

(cherry picked from commit b626dec)

CHANGELOG.md

@@ -49,6 +49,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 ### Removed
 
 ### Breaking Changes
+* (proto) [\#923](https://github.com/line/lbm-sdk/pull/923) deprecate broadcast mode `block`
 
 ### Build, CI
 * (ci, build) [\#901](https://github.com/line/lbm-sdk/pull/901) Update release pipeline to match non-wasm env

docs/core/proto-docs.md

@@ -8199,7 +8199,7 @@ BroadcastMode specifies the broadcast mode for the TxService.Broadcast RPC metho
 | Name | Number | Description |
 | ---- | ------ | ----------- |
 | BROADCAST_MODE_UNSPECIFIED | 0 | zero-value for mode ordering |
-| BROADCAST_MODE_BLOCK | 1 | BROADCAST_MODE_BLOCK defines a tx broadcasting mode where the client waits for the tx to be committed in a block. |
+| BROADCAST_MODE_BLOCK | 1 | DEPRECATED: use BROADCAST_MODE_SYNC instead, |
 | BROADCAST_MODE_SYNC | 2 | BROADCAST_MODE_SYNC defines a tx broadcasting mode where the client waits for a CheckTx execution response only. |
 | BROADCAST_MODE_ASYNC | 3 | BROADCAST_MODE_ASYNC defines a tx broadcasting mode where the client returns immediately. |
 

proto/cosmos/tx/v1beta1/service.proto

@@ -87,9 +87,8 @@ message BroadcastTxRequest {
 enum BroadcastMode {
   // zero-value for mode ordering
   BROADCAST_MODE_UNSPECIFIED = 0;
-  // BROADCAST_MODE_BLOCK defines a tx broadcasting mode where the client waits for
-  // the tx to be committed in a block.
-  BROADCAST_MODE_BLOCK = 1;
+  // DEPRECATED: use BROADCAST_MODE_SYNC instead,
+  BROADCAST_MODE_BLOCK = 1 [deprecated = true];
   // BROADCAST_MODE_SYNC defines a tx broadcasting mode where the client waits for
   // a CheckTx execution response only.
   BROADCAST_MODE_SYNC = 2;