docs(v1.5.4): update changelog

CHANGELOG.md

@@ -3,8 +3,23 @@
 New features, fixed bugs, known defects and other noteworthy changes to each release of the Catena-X Portal Frontend Registration.
 
 ### Unreleased
+
+
+## 1.5.4
+
+### Change
+- Legal information for distributions [TRG 7.05](https://eclipse-tractusx.github.io/docs/release/trg-7/trg-7-05/)
+  - added legal info at build
+
+### Bugfix
 * updated verify registration help link with valid link
 
+### Technical Support
+- added pull request linting
+
+### Known Knowns
+- Backend api errors are partially not handled on FE side, user receives on certain system error scenarios no message on the UI (e.g. if the GET /companyRoles has issues to fetch the already selected roles from the backend) - the issue only appears if the FE and BE are not correctly integrated or if the backend has business logic issues/db service issues
+
 ## 1.5.3
 
 ### Change