package/catch2: bump to version 3.8.0
For release note, see:
https://github.com/catchorg/Catch2/releases/tag/v3.8.0
Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
[Julien: add link to release note]
Signed-off-by: Julien Olivain <ju.o@free.fr>