fixup! [EXPORTERS]: elastic search set timestamp within @timestamp …

…instead of `timestamp`

exporters/elasticsearch/src/es_log_recordable.cc

@@ -210,25 +210,25 @@ nlohmann::json ElasticSearchRecordable::GetJSON() noexcept
 void ElasticSearchRecordable::SetTimestamp(
     opentelemetry::common::SystemTimestamp timestamp) noexcept
 {
+  const std::chrono::system_clock::time_point timePoint{timestamp};
+
   // If built with with at least cpp 20 then use std::format
   // Otherwise use the old style to format the timestamp in UTC
 #if __cplusplus >= 202002L
-  const std::chrono::system_clock::time_point timePoint{timestamp};
   const std::string dateStr = std::format("{:%FT%T%Ez}", timePoint);
 #else
   const static int dateToSecondsSize = 19;
   const static int millisecondsSize  = 8;
   const static int timeZoneSize      = 1;
   const static int dateSize          = dateToSecondsSize + millisecondsSize + timeZoneSize;
 
-  std::chrono::system_clock::time_point timestamp = std::chrono::system_clock::now();
-  std::time_t time = std::chrono::system_clock::to_time_t(timestamp);
+  std::time_t time = std::chrono::system_clock::to_time_t(timePoint);
   std::tm tm       = *std::gmtime(&time);
 
   char bufferDate[dateSize];  // example: 2024-10-18T07:26:00.123456Z
   std::strftime(bufferDate, sizeof(bufferDate), "%Y-%m-%dT%H:%M:%S", &tm);
   auto microseconds =
-      std::chrono::duration_cast<std::chrono::microseconds>(timestamp.time_since_epoch()) %
+      std::chrono::duration_cast<std::chrono::microseconds>(timePoint.time_since_epoch()) %
       std::chrono::seconds(1);
 
   char bufferMilliseconds[millisecondsSize];