Fix critical security issues

[mlqn]

Description

This PR should fix the last two critical security issues:

• https://github.com/Altinn/altinn-studio/security/dependabot/249
• https://github.com/Altinn/altinn-studio/security/dependabot/250

Verification

• [x] Your code builds clean without any errors or warnings
• [x] Manual testing done (required)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.47%. Comparing base (030107f) to head (0e5e829). Report is 5 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #13001 +/- ## ======================================= Coverage 91.47% 91.47% ======================================= Files 1401 1401 Lines 19839 19839 Branches 2397 2397 ======================================= Hits 18148 18148 Misses 1427 1427 Partials 264 264 ```

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