Fix: dump failing when a link target requires serialization and skip_link_targets=False

[mauvilsa]

Before submitting

• [x] Did you read the contributing guideline?
• [n/a] Did you update the documentation? (readme and public docstrings)
• [x] Did you write unit tests such that there is 100% coverage on related code? (required for bug fixes and new features)
• [x] Did you verify that new and existing tests pass locally?
• [x] Did you make sure that all changes preserve backward compatibility?
• [x] Did you update the CHANGELOG? (not for typos, docs, test updates, or minor internal changes/refactors)

[sonarcloud[bot]]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

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

Project coverage is 100.00%. Comparing base (2f3cce5) to head (0459596).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #542 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 22 22 Lines 6418 6420 +2 ========================================= + Hits 6418 6420 +2 ``` | [Flag](https://app.codecov.io/gh/omni-us/jsonargparse/pull/542/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=omni-us) | Coverage Δ | | |---|---|---| | [py3.10](https://app.codecov.io/gh/omni-us/jsonargparse/pull/542/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=omni-us) | `85.68% <100.00%> (+<0.01%)` | :arrow_up: | | [py3.10_all](https://app.codecov.io/gh/omni-us/jsonargparse/pull/542/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=omni-us) | `98.69% <100.00%> (+<0.01%)` | :arrow_up: | | 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[py3.12_types](https://app.codecov.io/gh/omni-us/jsonargparse/pull/542/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=omni-us) | `98.70% <100.00%> (+<0.01%)` | :arrow_up: | | [py3.7](https://app.codecov.io/gh/omni-us/jsonargparse/pull/542/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=omni-us) | `86.14% <100.00%> (+<0.01%)` | :arrow_up: | | [py3.7_all](https://app.codecov.io/gh/omni-us/jsonargparse/pull/542/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=omni-us) | `99.21% <100.00%> (+<0.01%)` | :arrow_up: | | [py3.7_types](https://app.codecov.io/gh/omni-us/jsonargparse/pull/542/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=omni-us) | `99.26% <100.00%> (+<0.01%)` | :arrow_up: | | 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