Add changelog for 0.33.0

CHANGELOG.md

+## 0.33.0 (2024-10-28)
+
+### feature (2 changes)
+
+- [Support GitLab dependency proxy when building gitlab-tofu images](https://gitlab.com/components/opentofu/-/commit/6bd8a73fa6c0445ec2cd44ad5bbd715afdd619a0) ([merge request](https://gitlab.com/components/opentofu/-/merge_requests/147))
+- [Check for dependencies when running gitlab-tofu](https://gitlab.com/components/opentofu/-/commit/67acb93ba910d879884144e4dc27d2ff2b432dea) ([merge request](https://gitlab.com/components/opentofu/-/merge_requests/146))
+
 ## 0.32.0 (2024-10-28)
 
 No changes.