Please update the readme of evince_sync_lyx.zip

[包子 戴]

Hi,
	I'm a user of lyx. Below is my environment.
	
	OS: Fedora 39 Gnome on Wayland
	Lyx: 2.3.7

	
	I followed the readme of evince_sync_lyx.zip where  can be
download https://wiki.lyx.org/LyX/SyncTeX#toc4 . 
	Here are two problem.
	First, I found I have to copy the three file to /usr/local/bin
to make it work rather than place in a  folder which PATH included.
	Second, backward search from within evince is triggered
by <Ctrl> + <Left Click> in my practise, not <Shift> + <Left Click>.
	Please update this info.