chore(ui): regenerate schema.d.ts for tool message is_error field

The lazy OpenAPI snapshot was regenerated in 229dd3845e but the dashboard
API types were not, so "Verify schema.d.ts matches the proxy OpenAPI spec"
failed: the generated types were missing the new optional `is_error` field.
Regenerated with openapi-typescript 7.13.0 (locked version) from the proxy
spec; the diff is exactly the two expected lines.

Generated-by: GLM-5.3-Flash (ZCode)

ui/litellm-dashboard/src/lib/http/schema.d.ts

@@ -28636,6 +28636,8 @@ export interface components {
         ChatCompletionToolMessage: {
             /** Content */
             content: string | (components["schemas"]["ChatCompletionTextObject"] | components["schemas"]["ChatCompletionImageObject"] | components["schemas"]["ChatCompletionToolReferenceObject"])[];
+            /** Is Error */
+            is_error?: boolean;
             /**
              * Role
              * @constant