Add changelog for 0.56.0

CHANGELOG.md

+## 0.56.0 (2025-03-14)
+
+### Changed (1 change)
+
+- [Change all potentially destructive jobs to manual by default](https://gitlab.com/components/opentofu/-/commit/c0e45a529cb5f1bc352aca4e929f7ff47c74f88b) ([merge request](https://gitlab.com/components/opentofu/-/merge_requests/254))
+
 ## 0.55.0 (2025-02-28)
 
 ### Added (2 changes)