obs-studio: 21.0.3 -> 21.1.1

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

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

These checks were done:

- built on NixOS
- ran `/nix/store/3dqzcmdm5caax4gqr61k05hmxrs1ca5w-obs-studio-21.1.1/bin/obs -h` got 0 exit code
- ran `/nix/store/3dqzcmdm5caax4gqr61k05hmxrs1ca5w-obs-studio-21.1.1/bin/obs --help` got 0 exit code
- ran `/nix/store/3dqzcmdm5caax4gqr61k05hmxrs1ca5w-obs-studio-21.1.1/bin/.obs-wrapped -h` got 0 exit code
- ran `/nix/store/3dqzcmdm5caax4gqr61k05hmxrs1ca5w-obs-studio-21.1.1/bin/.obs-wrapped --help` got 0 exit code
- found 21.1.1 with grep in /nix/store/3dqzcmdm5caax4gqr61k05hmxrs1ca5w-obs-studio-21.1.1
- directory tree listing: https://gist.github.com/08175928e798aeee1fb0326677000c7c