Merge pull request #730 from elyscape/fix/platform-os-features-format

Fix formatting of platform.os.features values list

Author: xiekeyang

image-index.md

@@ -63,7 +63,9 @@ For the media type(s) that this document is compatible with, see the [matrix][ma
 
         This OPTIONAL property specifies an array of strings, each specifying a mandatory OS feature.
         When `os` is `windows`, image indexes SHOULD use, and implementations SHOULD understand the following values:
-          - `win32k`: image requires `win32k.sys` on the host (Note: `win32k.sys` is missing on Nano Server)
+
+        - `win32k`: image requires `win32k.sys` on the host (Note: `win32k.sys` is missing on Nano Server)
+
         When `os` is not `windows`, values are implementation-defined and SHOULD be submitted to this specification for standardization.
 
     - **`variant`** *string*