There's a merged pull request on the void-packages repository

mdnsd: Conflicts with mDNSResponder
https://github.com/void-linux/void-packages/pull/34090

Description:
mdnsd and mDNSResponder both provide /usr/bin/mdnsd, so they should be marked as conflicting.

Fixes #33762

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#### Testing the changes
- I tested the changes in this PR: **NO**