fix the lint error in readme

cmd/exocore-test-tool/README.md

@@ -56,27 +56,39 @@ The specific processes for the two types of testing are as follows:
 A local node needs to be started through `local_node.sh` before testing.
 1. automated testing:
     Step 1: Initialize the configuration file in current directory
+
     ```shell
     exocore-test-tool init --home
     ```
+
     Step 2: Start the test tool
+
     ```shell
     exocore-test-tool start --home .
     ```
+
 2. manual testing:
-   Step 1: Initialize the configuration file in current directory
+
+    Step 1: Initialize the configuration file in current directory
+
     ```shell
     exocore-test-tool init --home
     ```
-   Step 2: Prepare test environment
+
+    Step 2: Prepare test environment
+
     ```shell
-    exocore-test-tool prepare --home .
+     exocore-test-tool prepare --home .
     ```
-   Step 3: Run batch tests
+
+    Step 3: Run batch tests
+
     ```shell
     exocore-test-tool batch-test depositLST --home .
     ```
+
 We can query transactions for a specific batch and status using the following command, either during or after the test:
+
 ```shell
 exocore-test-tool query-tx-record <msgType> <batch-id> <status>
 ```