Bump Npgsql.Json.NET from 6.0.2 to 6.0.3

Bumps [Npgsql.Json.NET](https://github.com/npgsql/npgsql) from 6.0.2 to 6.0.3.
- [Release notes](https://github.com/npgsql/npgsql/releases)
- [Commits](https://github.com/npgsql/npgsql/compare/v6.0.2...v6.0.3)

---
updated-dependencies:
- dependency-name: Npgsql.Json.NET
  dependency-type: direct:production
  update-type: version-update:semver-patch
...
Signed-off-by: Ndependabot[bot] <support@github.com>

IoTSharp.Data.PostgreSQL/IoTSharp.Data.PostgreSQL.csproj

@@ -18,7 +18,7 @@
 		<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="6.0.2" />
 		<PackageReference Include="EFCore.Sharding.PostgreSql" Version="6.0.0" />
 		<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL.NetTopologySuite" Version="6.0.2" />
-		<PackageReference Include="Npgsql.Json.NET" Version="6.0.2" />
+		<PackageReference Include="Npgsql.Json.NET" Version="6.0.3" />
 		<PackageReference Include="Npgsql.NodaTime" Version="6.0.2" />
 	</ItemGroup>