Add changelog for 0.55.0-rc3

CHANGELOG.md

+## 0.55.0-rc3 (2025-02-28)
+
+### Added (2 changes)
+
+- [Support input for auto definting the HTTP backend](https://gitlab.com/components/opentofu/-/commit/0e88019bc5947dd11a418e56b8a5bbb92d062f7c) ([merge request](https://gitlab.com/components/opentofu/-/merge_requests/248))
+- [Add auto_delete_input to destroy job](https://gitlab.com/components/opentofu/-/commit/47e9b9e7ff2a9269d9abe7dbe6017ca2b7ccbb7a) ([merge request](https://gitlab.com/components/opentofu/-/merge_requests/247))
+
 ## 0.55.0-rc2 (2025-02-28)
 
 ### Added (2 changes)