Fixup changelog link

Author: tobio

CHANGELOG.md

@@ -508,7 +508,7 @@ resource "elasticstack_fleet_output" "output" {
 - CI integration
 
 [Unreleased]: https://github.com/elastic/terraform-provider-elasticstack/compare/v0.12.0...HEAD
-[0.11.18]: https://github.com/elastic/terraform-provider-elasticstack/compare/v0.11.18...v0.12.0
+[0.12.0]: https://github.com/elastic/terraform-provider-elasticstack/compare/v0.11.18...v0.12.0
 [0.11.18]: https://github.com/elastic/terraform-provider-elasticstack/compare/v0.11.17...v0.11.18
 [0.11.17]: https://github.com/elastic/terraform-provider-elasticstack/compare/v0.11.16...v0.11.17
 [0.11.16]: https://github.com/elastic/terraform-provider-elasticstack/compare/v0.11.15...v0.11.16