Update dependency NServiceBus.Transport.AzureServiceBus to 6.4.0

Author: dependencyupdates[bot]

src/Directory.Packages.props

@@ -46,7 +46,7 @@
     <PackageVersion Include="NServiceBus.RabbitMQ" Version="11.2.1" />
     <PackageVersion Include="NServiceBus.SagaAudit" Version="6.0.1" />
     <PackageVersion Include="NServiceBus.Testing" Version="10.1.0" />
-    <PackageVersion Include="NServiceBus.Transport.AzureServiceBus" Version="6.3.0" />
+    <PackageVersion Include="NServiceBus.Transport.AzureServiceBus" Version="6.4.0" />
     <PackageVersion Include="NServiceBus.Transport.AzureStorageQueues" Version="14.0.1" />
     <PackageVersion Include="NServiceBus.Transport.Msmq.Sources" Version="4.0.1" />
     <PackageVersion Include="NServiceBus.Transport.PostgreSql" Version="9.0.2" />