test/README.md: Fix MD040 warnings

The following warnings are generated by using markdownlint analysis:
```
MD040/fenced-code-language Fenced code blocks should have a language specified [Context: "```"]
```
Refer to markdown-lint [1] to fix MD040
[1]: https://github.com/updownpress/markdown-lint/blob/master/rules/040-fenced-code-language.md

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: I7f120915c474e9707e07061a078fd2b490b70e0c
diff --git a/test/README.md b/test/README.md
index 8d46545..f608bab 100755
--- a/test/README.md
+++ b/test/README.md
@@ -6,10 +6,8 @@
 
   Run the following commands:
 
-  ```
-  meson -Doe-sdk=enabled -Dtests=enabled build
-  ninja -C build test
-  ```
+  1. meson -Doe-sdk=enabled -Dtests=enabled build
+  2. ninja -C build test
 
 - WHEN RUNNING UTEST remember to take advantage of the gtest capabilities.
   "./build/test/utest --help"