Fix FBX ASCII files that have embedded textures with ufbx update

[fire]

Tested versions

• Reproducable in 394508d

System information

Godot v4.4.beta unknown - macOS Sequoia (15.3.0) - Multi-window, 1 monitor - Metal (Forward+) - integrated Apple M2 Pro (Apple8) - Apple M2 Pro (12 threads)

Issue description

Update from upstream ufbx developer @bqqbarbhg

commit 963b87ec4390fcae35f2bb197216fddd5b8eccf2 tag v0.17.0 fixes an actual (but quite rare) issue with FBX ASCII files that have embedded textures

The task is to update the ufbx library in Godot which is a copy, paste and update legal information.

Steps to reproduce

• Download case from Corrupted texture blobs when decoding/combining base64 texture parts from ASCII .fbx file ufbx/ufbx#177
• Import with ufbx
• Does not match expectations

Minimal reproduction project (MRP)

https://github.com/drywolf/ufbx_base64_decode_bugfix