docs(changelog): update CHANGELOG.md with new features and version

- Add entry for version 1.1.0 with new feature for configuring saved headlines feed filters limits by user role
- Update format and structure of changelog
- Add date for version 1.0.0 release

Author: fulleni

CHANGELOG.md

@@ -1,3 +1,9 @@
-##1.0.0
+# Changelog
+
+## 1.1.0 - 2025-10-17
+- **feat**: allow configuration of saved headlines feed filters limits by user role and update dependencies
+
+
+## 1.0.0 - 2025-10-13
 
 - **BREAKING** feat!: migrated from date based versioning to semantic versioning.