downgrade robinraju/release-downloader to 1.8; trigger bin release via publish

[seiry]

• downgrade robinraju/release-downloader to 1.8, close the bin file airupnp and aircast in AirConnect-dsm7-x86_64-1.8.3-20240327.spk are broken #107
• trigger bin release when publish a tag

[eizedev]

Thanks @seiry! Looking good (i will check the release publishing action later that day).

Could you please re-add workflow_dispatch: to the on trigger to allow manual executions of the release action (for debugging purposes).

[eizedev]

Release is online: https://github.com/eizedev/AirConnect-Synology/releases/tag/1.8.3-20240403