SUSE: 2025:20394-1 important: less software crash updates

## This update for less fixes the following issues: * Updated to version 668 * Fixed crash when using --header on command line * Fixed possible crash when scrolling left/right or toggling -S * Fixed bug when using #stop in a lesskey file * Fixed bug when using --shift or --match-shift on command line with a parameter starting with '.' * Fixed bug in R command when file size changes * Fixed bug using --header when file does not fill screen * Fixed ^X bug when output is not a terminal * Fixed bug where ^Z is not handled immediately * Fixed bug where first byte from a LESSOPEN filter is deleted if it is greater than 0x7F * Fixed uninitialized variable in edit_ifile * Fixed incorrect handling of UTF-8 chars in prompts * Change preprocessor dependencies from Requires to Recommends. It's disabled by default and they are not necessary for less.