automake: 1.16 -> 1.16.1

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/jiqmw5sf5crwh8gc6fnc0g40xb7fpmhz-automake-1.16.1/bin/automake --help’ got 0 exit code
- ran ‘/nix/store/jiqmw5sf5crwh8gc6fnc0g40xb7fpmhz-automake-1.16.1/bin/aclocal --help’ got 0 exit code
- ran ‘/nix/store/jiqmw5sf5crwh8gc6fnc0g40xb7fpmhz-automake-1.16.1/bin/automake-1.16 --help’ got 0 exit code
- ran ‘/nix/store/jiqmw5sf5crwh8gc6fnc0g40xb7fpmhz-automake-1.16.1/bin/aclocal-1.16 --help’ got 0 exit code
- found 1.16.1 with grep in /nix/store/jiqmw5sf5crwh8gc6fnc0g40xb7fpmhz-automake-1.16.1
- directory tree listing: https://gist.github.com/13dcf476ba2260c529545daecd2a7571