Fix broken build by converting the link to absolute

Author: mnocon

docs/update_and_migration/from_4.6/update_to_5.0.md

@@ -29,7 +29,7 @@ It's important to stop using deprecated PHP classes as they're removed in 5.0.
 
 The [`ibexa/compatibility-layer`](to_4.0.md#add-compatibility-layer-package) isn't supported in 5.0.
 If you use it, remove it (`composer remove ibexa/compatibility-layer`) and make the necessary changes.
-See [[[= product_name =]] v4.0 deprecations and backwards compatibility breaks](ibexa_dxp_v4.0_deprecations.md) for the list of changes.
+See [[[= product_name =]] v4.0 deprecations and backwards compatibility breaks](/release_notes/ibexa_dxp_v4.0_deprecations.md) for the list of changes.
 
 [Rector](https://getrector.com/) and the [[= product_name_base =]] rule sets help to upgrade your code.