Fix typos in previous commit

Author: goneall

CHANGELOG.md

@@ -3,11 +3,11 @@ All notable changes to this project will be documented in this file.
 
 ## 3.0
 
-See the [v3.0 GithHub release notes](https://github.com/spdx/spdx-spec/releases/tag/v3.0) for changes.
+See the [v3.0 GitHub release notes](https://github.com/spdx/spdx-spec/releases/tag/v3.0) for changes.
 
 ## 2.3
 
-See the [v2.3 GithHub release notes](https://github.com/spdx/spdx-spec/releases/tag/v2.3) for changes.
+See the [v2.3 GitHub release notes](https://github.com/spdx/spdx-spec/releases/tag/v2.3) for changes.
 
 ## 2.2 (2020-05-02)