docs: revert changes to CHANGELOG.md (#625)

Signed-off-by: Marco Nenciarini <[email protected]>

Author: mnencia

CHANGELOG.md

@@ -1,13 +1,5 @@
 # Changelog
 
-## [Unreleased]
-
-### BREAKING CHANGES
-
-* **manifests:** Resource names have been prefixed to avoid cluster conflicts
-  - All cluster-scoped and namespace-scoped resources now use the `barman-plugin-` prefix for consistency
-  - See the [Resource Name Migration Guide](https://cloudnative-pg.io/plugin-barman-cloud/resource-name-migration/) for detailed migration instructions
-
 ## [0.7.0](https://github.com/cloudnative-pg/plugin-barman-cloud/compare/v0.6.0...v0.7.0) (2025-09-25)