chore(deps): update anomalyco/opencode action to v1.18.21

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
anomalyco/opencode	action	patch	v1.18.19 → v1.18.21

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Release Notes

anomalyco/opencode (anomalyco/opencode)

v1.18.21

Compare Source

Core

Bugfixes

• Continue responses when a model reports an unknown finish reason instead of stopping early
• Route Vertex AI eu and us multi-region Gemini requests through REP endpoints

Desktop

Bugfixes

• Keep file search results visible while the next search is loading
• Register the archive session command in both desktop layouts (@​NathanTCode)

Thank you to 1 community contributor:

• @​NathanTCode:
  • fix(app): register archive session command in both layouts (#​41741)

v1.18.20

Compare Source

Core

Bugfixes

• Surface failed subagent tool calls with a resumable task_id.
• Retry provider responses that end with finish_reason: network_error.
• Retry more network error variants, including network-error and network_error.
• Surface resumable subagent failures instead of returning an empty result.
• Preserve Cerebras max_completion_tokens without applying an extra output cap.
• Answer permission requests triggered by subagents during opencode run.
• Retry xAI capacity and temporary unavailability stream errors.

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