electrum-ltc: 3.0.5.1 -> 3.0.6.2

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2/bin/electrum-ltc -h` got 0 exit code
- ran `/nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2/bin/electrum-ltc --help` got 0 exit code
- ran `/nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2/bin/electrum-ltc help` got 0 exit code
- ran `/nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2/bin/electrum-ltc version` and found version 3.0.6.2
- ran `/nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2/bin/.electrum-ltc-wrapped -h` got 0 exit code
- ran `/nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2/bin/.electrum-ltc-wrapped --help` got 0 exit code
- ran `/nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2/bin/.electrum-ltc-wrapped help` got 0 exit code
- ran `/nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2/bin/.electrum-ltc-wrapped version` and found version 3.0.6.2
- found 3.0.6.2 with grep in /nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2
- found 3.0.6.2 in filename of file in /nix/store/7fpp297s6qy7r9m8j7pwkxgndp72lmzd-electrum-ltc-3.0.6.2