fstrm: 0.3.2 -> 0.4.0 (#40489)

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/p9y2vcrsa056xibh0y1xaz750mdcc5yq-fstrm-0.4.0-bin/bin/fstrm_capture --version’ and found version 0.4.0
- found 0.4.0 with grep in /nix/store/p9y2vcrsa056xibh0y1xaz750mdcc5yq-fstrm-0.4.0-bin
- directory tree listing: https://gist.github.com/5cc213160a9ec091c9e767b95bfe2cdd
- du listing: https://gist.github.com/c4b1f58631938c0cad031ac2dc920011