CHANGELOG: add entry for #8057

[skip ci]

CHANGELOG.md

@@ -7,6 +7,7 @@ All notable changes to Gogs are documented in this file.
 ### Added
 
 - Support using TLS for Redis session provider using `[session] PROVIDER_CONFIG = ...,tls=true`. [#7860](https://github.com/gogs/gogs/pull/7860)
+- Support expanading values in `app.ini` from environment variables, e.g. `[database] PASSWORD = ${DATABASE_PASSWORD}`. [#8057](https://github.com/gogs/gogs/pull/8057)
 
 ### Changed