strongswan: 5.6.1 -> 5.6.2

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/pki -h` got 0 exit code
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/pki --help` got 0 exit code
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/pki -h` and found version 5.6.2
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/pki --help` and found version 5.6.2
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/charon-cmd --help` got 0 exit code
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/charon-cmd --version` and found version 5.6.2
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/charon-cmd --help` and found version 5.6.2
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/ipsec --help` got 0 exit code
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/ipsec --version` and found version 5.6.2
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/ipsec version` and found version 5.6.2
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/swanctl -h` got 0 exit code
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/swanctl --help` got 0 exit code
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/swanctl -h` and found version 5.6.2
- ran `/nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2/bin/swanctl --help` and found version 5.6.2
- found 5.6.2 with grep in /nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2
- found 5.6.2 in filename of file in /nix/store/jd04xpik9zwmy39nh0axfss0m4hmw8yv-strongswan-5.6.2