debootstrap: 1.0.102 -> 1.0.103 (#42514)

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

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

These checks were done:

- built on NixOS
- /nix/store/ysxn2fpiivgri65bcqf9z2ys794vv7xk-debootstrap-1.0.103/bin/debootstrap passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 1.0.103 with grep in /nix/store/ysxn2fpiivgri65bcqf9z2ys794vv7xk-debootstrap-1.0.103
- directory tree listing: https://gist.github.com/06c1aec1c5c510a9ce4b0895c3a4fea2
- du listing: https://gist.github.com/81f3607504e359d1e330c44eb817d04b