misc/codex: Update to 0.96.0

While here, mark as BROKEN on i386 architecture. It does not build due
to out of memory error.

Changelog:

• https://github.com/openai/codex/releases/tag/rust-v0.90.0
• https://github.com/openai/codex/releases/tag/rust-v0.91.0
• https://github.com/openai/codex/releases/tag/rust-v0.92.0
• https://github.com/openai/codex/releases/tag/rust-v0.93.0
• https://github.com/openai/codex/releases/tag/rust-v0.94.0
• https://github.com/openai/codex/releases/tag/rust-v0.95.0
• https://github.com/openai/codex/releases/tag/rust-v0.96.0

Reported by: GitHub (watch releases)