impro: bump nlohmann to 3.11.2

[sndth]

Code change checklist

• I have ensured that all methods and functions are fully documented using doxygen style comments.
• My code follows the coding style guide.
• I tested that my change works before raising the PR.
• I have ensured that I did not break any existing API calls.
• I have not built my pull request using AI, a static analysis tool or similar without any human oversight.

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[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ braindigitalis
❌ sndth
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[braindigitalis]

hi,
you need to sign the developer covenant via clabot, and also tick the checkboxes to confirm all was tested before this can be merged.
thanks!

[Jaskowicz1]

Since we've heard nothing back, we're closing this and reopening it in #991. We'll give this some testing outside our CIs to ensure that this working without any issues and so we can resolve any issues if required.