test/README.md: Fix MD004 warnings

The following warnings are generated by using markdownlint analysis:
```
MD004/ul-style Unordered list style [Expected: dash; Actual: asterisk]
```
Refer to markdown-lint [1] to fix MD004
[1]: https://github.com/updownpress/markdown-lint/blob/master/rules/004-ul-style.md

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: Ie926528caaf9c82836fa9efffbb88c1382d88c77
diff --git a/test/README.md b/test/README.md
index 3ca46c9..8d46545 100755
--- a/test/README.md
+++ b/test/README.md
@@ -4,7 +4,7 @@
 
 - When using an SDK - make sure it has been built for an x86 machine.
 
-* Run the following commands:
+  Run the following commands:
 
   ```
   meson -Doe-sdk=enabled -Dtests=enabled build