Update dependency Npgsql to 9.0.4 (#1597)

Co-authored-by: dependencyupdates[bot] <218638057+dependencyupdates[bot]@users.noreply.github.com>

Author: dependencyupdates[bot]

src/NServiceBus.Transport.PostgreSql/NServiceBus.Transport.PostgreSql.csproj

@@ -11,7 +11,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Npgsql" Version="9.0.3" AutomaticVersionRange="false" />
+    <PackageReference Include="Npgsql" Version="9.0.4" AutomaticVersionRange="false" />
     <PackageReference Include="NServiceBus" Version="10.0.0-alpha.17" />
   </ItemGroup>