fix: align plugin-lib dependency pin to v0.8.5

[four-bytes-robby]

Problem

The @four-bytes/opencode-plugin-lib dependency pin in package.json was bumped to #v0.8.5, but the corresponding documentation in AGENTS.md was incorrectly updated to #v0.8.6 instead of #v0.8.5.

The v0.8.5 tag has now been created on four-bytes/four-opencode-plugin-lib, so the dependency should resolve correctly.

Fix

• AGENTS.md: Change #v0.8.6 → #v0.8.5 to align with the actual pin in package.json
• package.json: Already correctly pinned to #v0.8.5

Verification

After merging, bun install should resolve the dependency and bun run build should succeed.

[coderabbitai]

🔗 Related PRs

#162 - fix: use local file: dependency for plugin-lib instead of pinned v0.6.1 #161 [closed]
#166 - chore: bump plugin-lib to v0.8.0 (auto-synced) #165 [merged]
#167 - chore: bump plugin-lib to v0.8.1 (fixed port 4099) #165 [merged]
#169 - chore: regenerate bun.lock + update AGENTS.md to v0.8.2 #168 [merged]
#180 - chore: bump version to 1.8.0 [merged]

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