Update README.md

Author: namgold

README.md

@@ -5,5 +5,5 @@ This tool is used for export .json file from [https://dbdiagram.io](https://dbdi
 
  1. Copy diagrams from [https://dbdiagram.io](https://dbdiagram.io/) to *dbdiagram.input* file place at the root of project.
  2.  Run command:
-    > python main.py
- 3. Output has been generated to *dbdiagram.json*
+   > python main.py
+ 3. Output has been generated to *dbdiagram.json*