[Backport r0.11] Fix broken link in NovoGrad docstring

[bot-of-gabrieldemarmiesse]

Backport c083f28 from #2096

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[bot-of-gabrieldemarmiesse]

@shreyashpatodia

You are owner of some files modified in this pull request.
Would you kindly review the changes whenever you have the time to?
Thank you very much.