Fix the import comments of otelpconfig (#2224)

keep import comments of otelpconfig consistent with other

Signed-off-by: DQ <dengq@vmware.com>

Co-authored-by: Anthony Mirabella <a9@aneurysm9.com>
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

exporters/otlp/otlptrace/internal/otlpconfig/options.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/internal/otlpconfig"
+package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig"
 
 import (
 	"crypto/tls"