Fix golint issue caused by typo (#1847)
Fix golint issue caused by typo (#1847)

Signed-off-by: Hu Shuai <a4797ccdc3c71d8ffc5c17a5bb7f114e3818f278@cn.fujitsu.com>
open-telemetry/opentelemetry-go,open-telemetry/opentelemetry-go