fix markdown links

[apiraino]

Fixes 2 Markdown broken links that slipped in #1013, sorry! 🙂

thanks

Rendered

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[Urgau]

CI correctly detected both of them in the previous PR: https://github.com/rust-lang/rust-forge/actions/runs/22433371335/job/64957025549#step:6:331

We should figure out a way to show those warnings to contributors, but that's for another PR.