Assign correct value to ext_dt_spanId in Tld Geneva exporter (#1184)

Author: manio143

src/OpenTelemetry.Exporter.Geneva/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+* TldLogExporter to export `SpanId` value in `ext_dt_spanId` field instead of
+  `TraceId` value.
+  ([#1184](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/1184))
+
 ## 1.5.0-alpha.3
 
 Released 2023-Apr-19

src/OpenTelemetry.Exporter.Geneva/TLDExporter/TldLogExporter.cs

@@ -257,7 +257,7 @@ internal void SerializeLogRecord(LogRecord logRecord)
 
         if (logRecord.SpanId != default)
         {
-            eb.AddCountedString("ext_dt_spanId", logRecord.TraceId.ToHexString());
+            eb.AddCountedString("ext_dt_spanId", logRecord.SpanId.ToHexString());
             partAFieldsCount++;
         }