chore: bundle OfficeCLI 0.2.121

[luyang950]

Summary

• update the bundled OfficeCLI pin from 0.2.119 to 0.2.121
• ensure OfficeDex builds include image-template tag support

Verification

• downloaded both macOS architectures from officecli-dist v0.2.121 with SHA-256 verification
• staged universal binary reports officecli version 0.2.121 (c675162...)
• Canvas contract and full Canvas PPTX render smoke passed
• TypeScript lint passed
• renderer tests: 482 passed
• script tests: 38 passed
• normal and demo Go tests passed