A syntax file for the SFZ file format.

Places to install the file are:

For local user $HOME/.local/share/org.kde.syntax-highlighting/syntax/
For all users /usr/share/org.kde.syntax-highlighting/syntax/
For Flatpak packages $HOME/.var/app/flatpak-package-name/data/org.kde.syntax-highlighting/syntax/
For Snap packages $HOME/snap/snap-package-name/current/.local/share/org.kde.syntax-highlighting/syntax/
On Windows® %USERPROFILE%\AppData\Local\org.kde.syntax-highlighting\syntax

You may need to create the directories.