Update dependencies from https://github.com/dotnet/icu build 20250916.3 (#119791)

On relative base path root
Microsoft.NETCore.Runtime.ICU.Transport From Version 8.0.0-rtm.25462.1 -> To Version 8.0.0-rtm.25466.3

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
Co-authored-by: Tanner Gooding <tagoo@microsoft.com>

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -1,8 +1,8 @@
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.NETCore.Runtime.ICU.Transport" Version="8.0.0-rtm.25462.1">
+    <Dependency Name="Microsoft.NETCore.Runtime.ICU.Transport" Version="8.0.0-rtm.25466.3">
       <Uri>https://github.com/dotnet/icu</Uri>
-      <Sha>5ec8e0c36b1fb327e93f6ad5c26306c4c1423421</Sha>
+      <Sha>447bcbcb6d371d48d3e6e6fb31d2db0818301362</Sha>
     </Dependency>
     <Dependency Name="System.Net.MsQuic.Transport" Version="8.0.0-alpha.1.23527.1">
       <Uri>https://github.com/dotnet/msquic</Uri>

eng/Versions.props

@@ -229,7 +229,7 @@
     <!-- ILCompiler -->
     <MicrosoftDotNetILCompilerVersion>8.0.0-rc.1.23406.6</MicrosoftDotNetILCompilerVersion>
     <!-- ICU -->
-    <MicrosoftNETCoreRuntimeICUTransportVersion>8.0.0-rtm.25462.1</MicrosoftNETCoreRuntimeICUTransportVersion>
+    <MicrosoftNETCoreRuntimeICUTransportVersion>8.0.0-rtm.25466.3</MicrosoftNETCoreRuntimeICUTransportVersion>
     <!-- MsQuic -->
     <MicrosoftNativeQuicMsQuicSchannelVersion>2.4.8</MicrosoftNativeQuicMsQuicSchannelVersion>
     <SystemNetMsQuicTransportVersion>8.0.0-alpha.1.23527.1</SystemNetMsQuicTransportVersion>