fix: add mobility course name

[limwa]

Adds the name of the mobility course.

The response received from the API is as follows:

    {
      "fest_id": *redacted*,
      "fest_tipo": "M",
      "fest_tipo_descr": "Mobilidade",
      "cur_nome": "",
      "fest_a_lect_1_insc": 2024,
      "fest_d_1_insc": "2024-09-11",
      "cur_id": null,
      "est_alectivo": 2025,
      "est_sig": "NI",
      "est_nome": "Não Inscrito",
      "est_d_inicio": "2025-08-01",
      "est_d_fim": "",
      "inst_nome": "Faculdade de Engenharia",
      "inst_sigla": "FEUP",
      "ano_curricular": ""
    }

Review checklist

• [x] Terms and conditions reflect the current change
• [ ] Contains enough appropriate tests
• [x] If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• [x] Properly adds an entry in changelog.md with the change
• [x] If PR includes UI updates/additions, its description has screenshots
• [x] Behavior is as expected
• [x] Clean, well-structured code

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 11%. Comparing base (d859048) to head (fc9e349). Report is 4 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1331 +/- ## ======================================= - Coverage 11% 11% -0% ======================================= Files 268 268 Lines 7308 7310 +2 ======================================= Hits 799 799 - Misses 6509 6511 +2 ```