[skip e2e] Improve annotation (#14983)

Signed-off-by: NXieql <qianglong.xie@zilliz.com>

internal/util/trace/util.go

@@ -114,7 +114,7 @@ func StartSpanFromContextWithOperationName(ctx context.Context, operationName st
 	return StartSpanFromContextWithOperationNameWithSkip(ctx, operationName, 3, opts...)
 }
 
-// StartSpanFromContextWithOperationNameWithSkip starts a opentracing span with specific operation name.
+// StartSpanFromContextWithOperationNameWithSkip starts an opentracing span with specific operation name.
 // And will log print the current call line number and file name.
 func StartSpanFromContextWithOperationNameWithSkip(ctx context.Context, operationName string, skip int, opts ...opentracing.StartSpanOption) (opentracing.Span, context.Context) {
 	if ctx == nil {