Update syntax-highlight to latest version

Julien LepillerTue Aug 24 23:16:23+0200 2021

73e93db

gitile/LICENSES
namelast commitdate
AGPL-3.0-or-later.txtLicense with reuse.software, code is under AGPL, not LGPLSun Mar 21 18:00:42+0100 2021
CC0-1.0.txtLicense with reuse.software, code is under AGPL, not LGPLSun Mar 21 18:00:42+0100 2021
GPL-3.0-or-later.txtLicense with reuse.software, code is under AGPL, not LGPLSun Mar 21 18:00:42+0100 2021