Chore: fix up release notes for v1.0.0-alpha.1

Author: mxmason

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).
 
-Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
+Prior to v1.0.0-alpha.1, logs were generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
 ## [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
@@ -17,7 +17,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
  ### Security 
  - Dependencies have been updated
-## [v1.0.0-alpha.1](https://github.com/netlify-labs/netlify-plugin-a11y/compare/v1.0.0...v1.0.0-alpha.1)
+## [v1.0.0-alpha.1](https://github.com/netlify-labs/netlify-plugin-a11y/compare/v0.0.12...v1.0.0-alpha.1)
 
 ### Changed
 - `resultMode` is now `failWithIssues`, a boolean defaulting to true