streamlink/FFmpeg-Builds 20220320-1

Merge remote-tracking branch 'upstream/master'

- fix merge conflicts
- add win64 target to CI config
- update upload/download artifacts + deploy parameters
- clean up readme

streamlink/FFmpeg-Builds 20211030-1

docs: remove auto-builds section from readme

streamlink/FFmpeg-Builds 20210826-1

ci: fix deploy config