bazarr: update to 1.5.1

[smaarn]

Description

Updates bazarr from 1.4.5 to 1.5.1.

Also removes reference to "dead" wheel webrtcvad and replaces it by forked and active webcrtcvad-wheels (which is the one used by bazarr now).

Checklist

• [x] Build rule all-supported completed successfully
• [x] New installation of package completed successfully
• [x] Package upgrade completed successfully (Manually install the package again)
• [x] Package functionality was tested

Type of change

• [x] Package update