Add a sha256 file in the Assets for every release/tag

[djalan]

Hello

I suggest adding a checksum file with the other assets like there:
https://github.com/jellyfin/jellyfin-media-player/releases/tag/v1.9.0

It is useful for package managers instructions:
https://community.chocolatey.org/packages/jellyfin-media-player/1.9.0#files
Click Show beside install.ps1

Here is an example of a file:
It is used like this: sha256sum --check CHECKSUM.
It finds what ISO you have downloaded and computes its sum and prints if it is OK or not.

https://download.rockylinux.org/pub/rocky/9/isos/x86_64/CHECKSUM

https://rockylinux.org/download

# Rocky-9.1-20221214.1-x86_64-dvd.iso: 8906080256 bytes
SHA256 (Rocky-9.1-20221214.1-x86_64-dvd.iso) = d490bac0fbc08b5621b8d5c861fb6e2ac0c46fa6b78cc3858d8594c56d65d5cb
# Rocky-9.1-x86_64-boot.iso: 843055104 bytes
SHA256 (Rocky-9.1-x86_64-boot.iso) = a36753d0efbea2f54a3dc7bfaa4dba95efe9aa3d6af331d5c5b147ea91240c21
# Rocky-9.1-20221215.1-x86_64-minimal.iso: 1489108992 bytes
SHA256 (Rocky-9.1-20221215.1-x86_64-minimal.iso) = 750c373c3206ae79784e436cc94fffc122296cf1bf8129a427dcd6ba7fac5888
# Rocky-x86_64-minimal.iso: 1489108992 bytes
SHA256 (Rocky-x86_64-minimal.iso) = 750c373c3206ae79784e436cc94fffc122296cf1bf8129a427dcd6ba7fac5888
# Rocky-9.1-x86_64-dvd.iso: 9008185344 bytes
SHA256 (Rocky-9.1-x86_64-dvd.iso) = 69fa71d69a07c9d204da81767719a2af183d113bc87ee5f533f98a194a5a1f8a
# Rocky-x86_64-dvd.iso: 8906080256 bytes
SHA256 (Rocky-x86_64-dvd.iso) = d490bac0fbc08b5621b8d5c861fb6e2ac0c46fa6b78cc3858d8594c56d65d5cb
# Rocky-9.1-x86_64-minimal.iso: 1592590336 bytes
SHA256 (Rocky-9.1-x86_64-minimal.iso) = bae6eeda84ecdc32eb7113522e3cd619f7c8fc3504cb024707294e3c54e58b40
# Rocky-x86_64-boot.iso: 843055104 bytes
SHA256 (Rocky-x86_64-boot.iso) = a36753d0efbea2f54a3dc7bfaa4dba95efe9aa3d6af331d5c5b147ea91240c21