Chore: Add changelog for alpha 3

Author: mxmason

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Prior to v1.0.0-alpha.1, logs were generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
+## [v1.0.0-alpha.3](https://github.com/netlify-labs/netlify-plugin-a11y/compare/v1.0.0-alpha.2...v1.0.0-alpha.3)
+### Changed
+- Fixed colors of report printed when using `failWithIssues=true`.
+
 ## [v1.0.0-alpha.2](https://github.com/netlify-labs/netlify-plugin-a11y/compare/v1.0.0-alpha.1...v1.0.0-alpha.2)
 ### Changed
 - `standard` input is now `wcagLevel`