Npgsql: Add version 9.0.1

Author: amotl

.github/workflows/lang-npgsql.yml

@@ -43,7 +43,7 @@ jobs:
       matrix:
         os: [ 'ubuntu-latest' ]
         dotnet-version: [ '7.0.x', '8.0.x', '9.0.x' ]
-        npgsql-version: [ '7.0.9', '8.0.6' ]
+        npgsql-version: [ '7.0.9', '8.0.6', '9.0.1' ]
         cratedb-version: [ 'nightly' ]
 
     # https://docs.github.com/en/free-pro-team@latest/actions/guides/about-service-containers

by-language/csharp-npgsql/demo.csproj

@@ -2,14 +2,14 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>netcoreapp3.1;net48;net5.0;net6.0;net7.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;net8.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateProgramFile>false</GenerateProgramFile>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Npgsql" Version="8.0.6" />
+    <PackageReference Include="Npgsql" Version="9.0.1" />
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
     <PackageReference Include="xunit" Version="2.9.2" />