[cmake] Bump minimum version to 3.31 (#4055)

Ubuntu 24.04 can't hurt us anymore.

Some other deps may have their versions raised, but there's not much of
an incentive so we'll keep it as is for now.

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4055
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

0 files changed, 0 insertions, 0 deletions