add user doc for snapshot [skip ci]
@@ -23,6 +23,7 @@ cp -rf target/${type}/cita-network target/install/bin/
cp -rf target/${type}/cita-executor target/install/bin/
cp -rf target/${type}/trans_evm target/install/bin/
cp -rf target/${type}/create_key_addr target/install/bin/
+cp -rf target/${type}/snapshot_tool target/install/bin/
cp -rf target/${type}/chain_performance target/install/bin/
cp -rf target/${type}/amqp_test target/install/bin/
cp -rf target/${type}/jsonrpc_performance target/install/bin/
