clutter-gst: 3.0.24 -> 3.0.26

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 3.0.26 with grep in /nix/store/3x1gsqxcrbyiq3jncz9k8dfa8bi0bamf-clutter-gst-3.0.26
- found 3.0.26 in filename of file in /nix/store/3x1gsqxcrbyiq3jncz9k8dfa8bi0bamf-clutter-gst-3.0.26