mdns: Skip rest of mdns questions when parsing packet

[haaspors]

This fixes the annoying warning when receiving a mdns packet with more than 3 questions

[2023-11-09T12:04:04Z WARN webrtc_mdns::conn] Failed to parse mDNS packet parsing/packing of this type isn't available yet [2023-11-09T12:04:08Z WARN webrtc_mdns::conn] Failed to parse mDNS packet parsing/packing of this type isn't available yet [2023-11-09T12:04:17Z WARN webrtc_mdns::conn] Failed to parse mDNS packet parsing/packing of this type isn't available yet

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (13c490c) 61.59% compared to head (15f53a6) 61.53%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #511      +/-   ##
==========================================
- Coverage   61.59%   61.53%   -0.07%     
==========================================
  Files         529      529              
  Lines       48912    48865      -47     
  Branches    12365    12374       +9     
==========================================
- Hits        30129    30069      -60     
+ Misses       9601     9596       -5     
- Partials     9182     9200      +18     

Files	Coverage Δ
mdns/src/conn/mod.rs	58.06% <100.00%> (+0.19%)	⬆️

... and 43 files with indirect coverage changes

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