misc/codex: Update to 0.125.0

Changelog:

• https://github.com/openai/codex/releases/tag/rust-v0.121.0
• https://github.com/openai/codex/releases/tag/rust-v0.122.0
• https://github.com/openai/codex/releases/tag/rust-v0.123.0
• https://github.com/openai/codex/releases/tag/rust-v0.124.0
• https://github.com/openai/codex/releases/tag/rust-v0.125.0

Reported by: GitHub (watch releases)