chore(dependencies): bump System.Text.Json to 8.0.4

Description

dependency to Microsoft.EntityFrameworkCore was changed to Microsoft.EntityFrameworkCore.Design 8.0.7 dependency to frameworks was upgraded to 2.4.2

Why

System.Text.Json 8.0.0 has a vulnerability that must be fixed. It is references as an implicit dependency. Referencing Microsoft.EntityFrameworkCore.Design 8.0.7 instead of Microsoft.EntityFrameworkCore implicitly upgrades System.Json.Text to 8.0.4 which solves the security-issue. Same with frameworks - upgrading to latest 2.4.2 resolves outdated references to System.Text.Json 8.0.0

Issue

https://github.com/eclipse-tractusx/portal/issues/369

Checklist

Please delete options that are not relevant.

[X] I have followed the contributing guidelines
[X] I have performed a self-review of my own code
[X] I have successfully tested my changes locally
[X] I have checked that new and existing tests pass locally with my changes

eclipse-tractusx / ssi-authority-schema-registry