coturn: 4.5.0.6 -> 4.5.0.7

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/70pa0xb505v9glp792ldfq66ifjbrk5i-coturn-4.5.0.7/bin/turnserver -h` got 0 exit code
- ran `/nix/store/70pa0xb505v9glp792ldfq66ifjbrk5i-coturn-4.5.0.7/bin/turnserver -h` and found version 4.5.0.7
- ran `/nix/store/70pa0xb505v9glp792ldfq66ifjbrk5i-coturn-4.5.0.7/bin/turnadmin -h` got 0 exit code
- ran `/nix/store/70pa0xb505v9glp792ldfq66ifjbrk5i-coturn-4.5.0.7/bin/turnadmin --help` got 0 exit code
- ran `/nix/store/70pa0xb505v9glp792ldfq66ifjbrk5i-coturn-4.5.0.7/bin/turnutils_natdiscovery help` got 0 exit code
- found 4.5.0.7 with grep in /nix/store/70pa0xb505v9glp792ldfq66ifjbrk5i-coturn-4.5.0.7
- found 4.5.0.7 in filename of file in /nix/store/70pa0xb505v9glp792ldfq66ifjbrk5i-coturn-4.5.0.7