feat: use REST v8.0.0-alpha.3

Author: sansan

envs/latest

@@ -5,7 +5,7 @@ POLYMESH_CHAIN_WS_PORT=9944
 POLYMESH_CHAIN_RPC_PORT=9933
 POLYMESH_CHAIN_P2P_PORT=30333
 
-POLYMESH_REST_API_IMAGE=polymeshassociation/polymesh-rest-api:v7.2.0-alpha.7
+POLYMESH_REST_API_IMAGE=polymeshassociation/polymesh-rest-api:v8.0.0-alpha.3
 POLYMESH_REST_API_LOCAL_SM_PORT=3004
 POLYMESH_REST_API_VAULT_SM_PORT=3005