release: fix release notes manual install url
release: fix release notes manual install url

bastimeyer/streamlink,beardypig/streamlink,back-to/streamlink,gravyboat/streamlink,wlerin/streamlink,gravyboat/streamlink,chhe/streamlink,back-to/streamlink,streamlink/streamlink,wlerin/streamlink,melmorabity/streamlink,beardypig/streamlink,streamlink/streamlink,bastimeyer/streamlink,chhe/streamlink,melmorabity/streamlink