chore: fix struct field name in comment (#2374)

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## Overview

 fix struct field name in comment

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<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

- **Documentation**
- Updated method comments to reflect new method names for improved
clarity and consistency. No functional changes were made.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: one230six <723682061@qq.com>

Author: one230six

pkg/store/types.go

@@ -14,10 +14,10 @@ type Store interface {
 	// SetHeight sets the height saved in the Store if it is higher than the existing height.
 	SetHeight(ctx context.Context, height uint64) error
 
-	// SaveBlock saves block along with its seen signature (which will be included in the next block).
+	// SaveBlockData saves block along with its seen signature (which will be included in the next block).
 	SaveBlockData(ctx context.Context, header *types.SignedHeader, data *types.Data, signature *types.Signature) error
 
-	// GetBlock returns block at given height, or error if it's not found in Store.
+	// GetBlockData returns block at given height, or error if it's not found in Store.
 	GetBlockData(ctx context.Context, height uint64) (*types.SignedHeader, *types.Data, error)
 	// GetBlockByHash returns block with given block header hash, or error if it's not found in Store.
 	GetBlockByHash(ctx context.Context, hash []byte) (*types.SignedHeader, *types.Data, error)