Prepare 23.16.0

Author: hynek

CHANGELOG.md

@@ -13,7 +13,7 @@ You can find our backwards-compatibility policy [here](https://github.com/hynek/
 <!-- changelog follows -->
 
 
-## [Unreleased](https://github.com/hynek/svcs/compare/23.15.0...HEAD)
+## [23.16.0](https://github.com/hynek/svcs/compare/23.15.0...23.16.0) - 2023-08-14
 
 ### Added