Minor edits

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [unreleased]
+## [Unreleased]
 
 ### Added
 
@@ -17,19 +17,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-## [1.2.1] - 2020-1-3
-
-### Added
-
-### Changed
-
-### Deprecated
-
-### Removed
+## [1.2.1] - 2020-01-03
 
 ### Fixed
 
-- create a sidToString function to deal with API changes in various versions of golang.org/x/sys/windows [#74](https://github.com/elastic/go-sysinfo/pull/74)
+- Create a `sidToString` function to deal with API changes in various versions of golang.org/x/sys/windows. [#74](https://github.com/elastic/go-sysinfo/pull/74)
 
 ## [1.2.0] - 2019-12-09