[openfbx] Fix typo in exported CMake namespace

[Jack·Boos·Yu (JackBoosY)]

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version, or no changes were necessary.
• Any fixed CI baseline and CI feature baseline entries are removed from that file, or no entries needed to be changed.
• All patch files in the port are applied and succeed.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Exactly one version is added in each modified versions file.

Fixes #53451

[Billy O'Neal (BillyONeal)]

Thanks!

GPT 5.6 Sol notes the following:

A non-blocking, pre-existing devendoring issue remains: src/ofbx.cpp uses #include "libdeflate.h", which selects OpenFBX's source-local bundled src/libdeflate.h from libdeflate 1.18, while vcpkg links libdeflate 1.25. Compiling and linking against different libdeflate versions is contrary to the port's devendoring expectations.