Update embree library version (embree3-devel) to install for Fedora.

[worstname]

Update embree library version (embree3-devel) to install for Fedora. You need embree3 to compile Godot from source while using system libraries, otherwise you will get these errors:

In file included from modules/raycast/lightmap_raycaster_embree.cpp:33:
modules/raycast/lightmap_raycaster_embree.h:40:10: fatal error: 'embree3/rtcore.h' file not found
#include <embree3/rtcore.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.
scons: *** [modules/raycast/lightmap_raycaster_embree.linuxbsd.editor.dev.x86_64.llvm.o] Error 1
In file included from modules/raycast/register_types.cpp:33:
modules/raycast/lightmap_raycaster_embree.h:40:10: fatal error: 'embree3/rtcore.h' file not found
#include <embree3/rtcore.h>
         ^~~~~~~~~~~~~~~~~~
In file included from modules/raycast/raycast_occlusion_cull.cpp:31:
modules/raycast/raycast_occlusion_cull.h:43:10: fatal error: 'embree3/rtcore.h' file not found
#include <embree3/rtcore.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.
scons: *** [modules/raycast/raycast_occlusion_cull.linuxbsd.editor.dev.x86_64.llvm.o] Error 1
1 error generated.
scons: *** [modules/raycast/register_types.linuxbsd.editor.dev.x86_64.llvm.o] Error 1
scons: building terminated because of errors.

Command used to build from source (4.0.3-stable) successfully on Fedora 38

scons platform=linuxbsd builtin_embree=no builtin_enet=no builtin_freetype=no builtin_graphite=no builtin_harfbuzz=no builtin_libogg=no builtin_libpng=no builtin_libtheora=no builtin_libvorbis=no builtin_libwebp=no builtin_mbedtls=no builtin_miniupnpc=no builtin_pcre2=no builtin_zlib=no builtin_zstd=no use_llvm=yes linker=lld dev_build=yes dev_mode=yes tests=yes use_lto=yes

[Calinou]

I can confirm this change is required on Fedora 38.

[mhilbrunner]

Yeah, I just saw Akien put that helpful bit of context into the RC channel :P For posterity:

Fedora did update its embree package to 4.0 which is incompatible with Godot. They still provide embree 3 as embree3-devel.

In this goes! Thanks @worstname for taking the time to contribute so others don't run into this small hiccup, and congrats on your first merged contribution to Godot's docs!