Update release note

Author: justinyoo

release-notes/v0.3.1-preview.md renamed to release-notes/v0.3.2-preview.md

@@ -2,7 +2,7 @@
 
 Updated Open API metadata generation logic.
 
-> **NOTE**: There is no v0.3.0-preview!
+> **NOTE**: There is no `v0.3.0-preview` and `v0.3.1-preview`!
 
 
 ### Changes ###