texstudio: 2.12.8 -> 2.12.10 (#43154)

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

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

Version release notes (from GitHub):
TeXstudio 2.12.10
----------------
- bug fixes
- fix structure view with Qt >5.10

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/lpnv7mgqxh4dvngjkda0l04lsqg99ad0-texstudio-2.12.10/bin/texstudio 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 2.12.10 with grep in /nix/store/lpnv7mgqxh4dvngjkda0l04lsqg99ad0-texstudio-2.12.10
- directory tree listing: https://gist.github.com/30bd87321ac5fe523c2a1eb759af22c9
- du listing: https://gist.github.com/04363c828381c5273c6c80caa9b552f4