Use correct error in debug log for request failure
It was using plain `err` twice and never logging the `retryErr`.
@@ -740,7 +740,7 @@ start:
"tries", tries,
"backoff", backoff,
"request_error", err,
- "response_error", err,
+ "response_error", retryErr,
)
if r.cl.waitTries(ctx, backoff) {
next, nextErr = r.br()
