Update MEAI version to 9.4.4-preview.1.25259.16

Author: MackinnonBuck

Directory.Packages.props

@@ -60,7 +60,7 @@
     <PackageVersion Include="LLamaSharp" Version="0.21.0" />
     <PackageVersion Include="FaissMask" Version="0.4.2" />
     <PackageVersion Include="FastText.NetWrapper" Version="1.3.1" />
-    <PackageVersion Include="Microsoft.Extensions.AI.Abstractions" Version="9.4.3-preview.1.25230.7" />
+    <PackageVersion Include="Microsoft.Extensions.AI.Abstractions" Version="9.4.4-preview.1.25259.16" />
     <PackageVersion Include="System.Text.Encodings.Web" Version="8.0.0" />
     <PackageVersion Include="MongoDB.Driver" Version="3.1.0" />
     <PackageVersion Include="Docnet.Core" Version="2.7.0-alpha.1" />