povray: 3.7.0.4 -> 3.7.0.7

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/rk5yid5v5bb50v4pxzfwdl72939m1djr-povray-3.7.0.7/bin/povray -h` got 0 exit code
- ran `/nix/store/rk5yid5v5bb50v4pxzfwdl72939m1djr-povray-3.7.0.7/bin/povray --help` got 0 exit code
- ran `/nix/store/rk5yid5v5bb50v4pxzfwdl72939m1djr-povray-3.7.0.7/bin/povray --version` and found version 3.7.0.7
- ran `/nix/store/rk5yid5v5bb50v4pxzfwdl72939m1djr-povray-3.7.0.7/bin/povray -h` and found version 3.7.0.7
- ran `/nix/store/rk5yid5v5bb50v4pxzfwdl72939m1djr-povray-3.7.0.7/bin/povray --help` and found version 3.7.0.7
- found 3.7.0.7 with grep in /nix/store/rk5yid5v5bb50v4pxzfwdl72939m1djr-povray-3.7.0.7