easyloggingpp: 9.96.0 -> 9.96.1

Semi-automatic update. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 9.96.1 with grep in /nix/store/ha2fl2l2j3p9lcn6scxn1n50f1vsb5k6-easyloggingpp-9.96.1
- found 9.96.1 in filename of file in /nix/store/ha2fl2l2j3p9lcn6scxn1n50f1vsb5k6-easyloggingpp-9.96.1