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: If4b0dcbd538a886d593ab3162f019a817eadeedd
diff --git a/test/README.md b/test/README.md
index da50c21..444d7e5 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 -Dtests=enabled build