fix(opencode): use low reasoning effort for GitHub Copilot gpt-5 models (#22824)

Co-authored-by: opencode-agent[bot] <opencode-agent[bot]@users.noreply.github.com>
Co-authored-by: rekram1-node <rekram1-node@users.noreply.github.com>

packages/opencode/src/provider/transform.ts

@@ -923,7 +923,7 @@ export function smallOptions(model: Provider.Model) {
     model.api.npm === "@ai-sdk/github-copilot"
   ) {
     if (model.api.id.includes("gpt-5")) {
-      if (model.api.id.includes("5.")) {
+      if (model.api.id.includes("5.") || model.api.id.includes("5-mini")) {
         return { store: false, reasoningEffort: "low" }
       }
       return { store: false, reasoningEffort: "minimal" }