Update concepts-migrate-mydumper-myloader.md

corrects code block build error

Author: ChaseCrum

articles/mysql/migrate/concepts-migrate-mydumper-myloader.md

@@ -42,14 +42,15 @@ Before you begin migrating your MySQL database, you need to:
 
 4.
 
-    * Update the package index on the Azure VM running Linux by running the following command:
-      ```bash
-        sudo apt update
-      ```
-    * Install the mysql client package by running the following command:
-      ```bash
-        sudo apt install mysql-client
-      ```
+* Update the package index on the Azure VM running Linux by running the following command:
+```bash
+sudo apt update
+```
+* Install the mysql client package by running the following command:
+
+```bash
+sudo apt install mysql-client
+```
 
 ## Install mydumper/myloader