fix: add ARG_COPILOT_MODEL to agentapi install script

Author: DevelopmentCats

registry/coder-labs/modules/copilot/main.tf

@@ -290,6 +290,7 @@ module "agentapi" {
     ARG_WORKDIR='${local.workdir}' \
     ARG_MCP_CONFIG='${var.mcp_config != "" ? base64encode(var.mcp_config) : ""}' \
     ARG_COPILOT_CONFIG='${base64encode(local.final_copilot_config)}' \
+    ARG_COPILOT_MODEL='${var.copilot_model}' \
     ARG_EXTERNAL_AUTH_ID='${var.external_auth_id}' \
     /tmp/install.sh
   EOT