uftp: 4.9.6 -> 4.9.7 (#41236)

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

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

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/xdg3hz58kdakygb1qigw2x1kh1gk5z4n-uftp-4.9.7/bin/uftp had a zero exit code or showed the expected version
- /nix/store/xdg3hz58kdakygb1qigw2x1kh1gk5z4n-uftp-4.9.7/bin/uftpd passed the binary check.
- /nix/store/xdg3hz58kdakygb1qigw2x1kh1gk5z4n-uftp-4.9.7/bin/uftp_keymgt passed the binary check.
- Warning: no invocation of /nix/store/xdg3hz58kdakygb1qigw2x1kh1gk5z4n-uftp-4.9.7/bin/uftpproxyd had a zero exit code or showed the expected version
- 2 of 4 passed binary check by having a zero exit code.
- 0 of 4 passed binary check by having the new version present in output.
- found 4.9.7 with grep in /nix/store/xdg3hz58kdakygb1qigw2x1kh1gk5z4n-uftp-4.9.7
- directory tree listing: https://gist.github.com/1fe6684f427417f8a9e189f960c84a74
- du listing: https://gist.github.com/15a89b170d541884994e503690c961ef