Update CHANGELOG.md

Author: chawyehsu

CHANGELOG.md

@@ -1,3 +1,9 @@
+## [Unreleased](https://github.com/ScoopInstaller/Scoop/compare/master...develop)
+
+### Bug Fixes
+
+- **schema**: Set manifest schema to be stricter ([#5093](https://github.com/ScoopInstaller/Scoop/issues/5093))
+
 ## [v0.2.4](https://github.com/ScoopInstaller/Scoop/compare/v0.2.3...v0.2.4) - 2022-08-08
 
 ### Features