libsForQt5.libopenshot-audio: 0.1.5 -> 0.1.6 (#42985)

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/libopenshot-audio/versions.

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/vb21d43jjccq86v505dhqhrb7rfaxv6q-libopenshot-audio-0.1.6/bin/openshot-audio-test-sound had a zero exit code or showed the expected version
- 0 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 0.1.6 with grep in /nix/store/vb21d43jjccq86v505dhqhrb7rfaxv6q-libopenshot-audio-0.1.6
- directory tree listing: https://gist.github.com/4efbc53208f322153ba4881b6b6eefb9
- du listing: https://gist.github.com/e3a2a71be83163ed2ecdc2aaa0800d83