Update NuGet package versions for dependencies
Upgraded the following NuGet packages to newer versions:
- `SixLabors.ImageSharp` from `3.1.11` to `3.1.12`
- `HtmlAgilityPack` from `1.12.3` to `1.12.4`
- `Swashbuckle.AspNetCore` from `9.0.5` to `9.0.6`
- `MailKit` from `4.14.0` to `4.14.1`
- `EFCore.NamingConventions` from `9.0.0` to `10.0.0-rc.2`
- `Npgsql.EntityFrameworkCore.PostgreSQL` from `9.0.4` to `10.0.0-rc.2`