[stable28] Bump NcVue to v8.6.2

[JuliaKirschenheuter]

Bump NcVue to v8.6.2

[susnux]

We should also - if not first - bump master or we end up with stable branches being ahead of main branch

[Pytal]

We should also - if not first - bump master or we end up with stable branches being ahead of main branch

#550

[Pytal]

/compile amend /

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