gcompris: 0.90 -> 0.91

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

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

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/di4sm1nsx7zshk1n6njvnd07m0abj6cc-gcompris-0.91/bin/gcompris-qt had a zero exit code or showed the expected version
- Warning: no invocation of /nix/store/di4sm1nsx7zshk1n6njvnd07m0abj6cc-gcompris-0.91/bin/.gcompris-qt-wrapped had a zero exit code or showed the expected version
- 0 of 2 passed binary check by having a zero exit code.
- 0 of 2 passed binary check by having the new version present in output.
- found 0.91 with grep in /nix/store/di4sm1nsx7zshk1n6njvnd07m0abj6cc-gcompris-0.91
- directory tree listing: https://gist.github.com/0ac8ed77cca8102d4b32b9b9361464f4
- du listing: https://gist.github.com/5f6daf6f26bdc5d5e1c4f4f4359ae0fa