Update dependency Npgsql to 9.0.4

Author: dependencyupdates[bot]

src/Directory.Packages.props

@@ -15,7 +15,7 @@
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="5.2.3" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageVersion Include="Mindscape.Raygun4Net.AspNetCore" Version="11.2.3" />
-    <PackageVersion Include="Npgsql" Version="9.0.3" />
+    <PackageVersion Include="Npgsql" Version="9.0.4" />
     <PackageVersion Include="NuGet.Versioning" Version="6.14.0" />
     <PackageVersion Include="NUnit" Version="4.4.0" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.10.0" />