[TASK] Fix UPGRADE.md

UPGRADE.md

-## Version 4 Breaking Changes
-
-- Dropped TYPO3 8 support
-
 ## Version 5 Breaking Changes
 
 - Dropped TYPO3 9 support
+- Dropped php 7.3 support
 - Dropped city, street, zip and hide_in_frontend fields from the contact table. There is no upgrade wizard. The fields were not used inside the main template/code since some time. The latter one was depcrated since a while. Adjust your local template to use the company fields instead.
+- Job location field is deprecated, use different Companies instead
+
+## Version 4 Breaking Changes
+
+- Dropped TYPO3 8 support