Update changelog with ScssLint status handling

Author: sds

CHANGELOG.md

@@ -47,6 +47,8 @@
   almost all hooks yourself in your `.overcommit.yml`. If you are migrating from
   `overcommit` 0.23.0 and want to use the default configuration that shipped
   with that version, copy the [default configuration from 0.23.0](https://github.com/brigade/overcommit/blob/9f03e9c82b385d375a836ca7146b117dbde5c822/config/default.yml)
+* Update `ScssLint` pre-commit hook to properly handle special exit code that
+  signals all files were filtered by exclusions (new as of `scss-lint` 0.36.0)
 
 ## 0.23.0