Update Changelog for Issue #8.

Author: suikan4github

CHANGELOG.md

@@ -6,7 +6,8 @@ History of the project development
 ### Changed
 - [Issue #4](https://github.com/suikan4github/rpp_driver/issues/4) Add gcov support for x86 build. 
 - [Issue #5](https://github.com/suikan4github/rpp_driver/issues/5) Migrate action from hand-made to marketplace.
-- [Issue #8](https://github.com/suikan4github/rpp_driver/issues/8)  Remove duplicated assertions in the adau1361lower.cpp.
+- [Issue #6](https://github.com/suikan4github/rpp_driver/issues/6) Add comment string to the assertion.
+- [Issue #8](https://github.com/suikan4github/rpp_driver/issues/8) Remove duplicated assertions in the adau1361lower.cpp.
 
 ### Deprecated
 ### Removed