Change the DNS validation

[Gsantomaggio]

Fixes #125

Signed-off-by: Gabriele Santomaggio G.santomaggio@gmail.com

[codecov-commenter]

Codecov Report

Merging #126 (928e35b) into main (62217de) will decrease coverage by 0.26%.
The diff coverage is 88.88%.

❗ Current head 928e35b differs from pull request most recent head 044e3a3. Consider uploading reports for the commit 044e3a3 to get more accurate results

@@            Coverage Diff             @@
##             main     #126      +/-   ##
==========================================
- Coverage   91.70%   91.44%   -0.27%     
==========================================
  Files          75       75              
  Lines        5668     5668              
  Branches      349      349              
==========================================
- Hits         5198     5183      -15     
- Misses        383      397      +14     
- Partials       87       88       +1     

Impacted Files	Coverage Δ
RabbitMQ.Stream.Client/RoutingClient.cs	98.66% <87.50%> (-1.34%)	⬇️
Tests/UnitTests.cs	98.02% <100.00%> (ø)
RabbitMQ.Stream.Client/WireFormatting.cs	70.50% <0.00%> (-4.32%)	⬇️
RabbitMQ.Stream.Client/LogEventSource.cs	90.69% <0.00%> (-2.33%)	⬇️
RabbitMQ.Stream.Client/Client.cs	91.21% <0.00%> (-1.42%)	⬇️
Tests/ClientTests.cs	95.94% <0.00%> (-1.36%)	⬇️
RabbitMQ.Stream.Client/MetaData.cs	91.58% <0.00%> (+0.93%)	⬆️
RabbitMQ.Stream.Client/Subscribe.cs	65.21% <0.00%> (+1.08%)	⬆️

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[lukebakken]

Feel free to create rc.3 with this change!