Bump Npgsql from 4.0.3 to 5.0.5

Bumps [Npgsql](https://github.com/npgsql/npgsql) from 4.0.3 to 5.0.5.
- [Release notes](https://github.com/npgsql/npgsql/releases)
- [Commits](npgsql/npgsql@v4.0.3...v5.0.5)

Signed-off-by: dependabot[bot] <support@github.com>

src/NHibernate.Test/NHibernate.Test.csproj

@@ -64,7 +64,7 @@
     <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
     <PackageReference Include="FirebirdSql.Data.FirebirdClient" Version="6.6.0" />
-    <PackageReference Include="Npgsql" Version="4.0.3" />
+    <PackageReference Include="Npgsql" Version="5.0.5" />
     <PackageReference Include="MySql.Data" Version="8.0.22" />
   </ItemGroup>
   <ItemGroup Condition="$(NhNetFx)">