Update opentelemetry-semconv to 1.29.0-alpha

Author: typelevel-steward[bot]

build.sbt

@@ -87,7 +87,7 @@ val MUnitScalaCheckEffectVersion = "2.0.0-M2"
 val OpenTelemetryVersion = "1.45.0"
 val OpenTelemetryInstrumentationVersion = "2.10.0"
 val OpenTelemetryInstrumentationAlphaVersion = "2.10.0-alpha"
-val OpenTelemetrySemConvVersion = "1.28.0-alpha"
+val OpenTelemetrySemConvVersion = "1.29.0-alpha"
 val OpenTelemetryProtoVersion = "1.4.0-alpha"
 val PekkoStreamVersion = "1.1.2"
 val PekkoHttpVersion = "1.1.0"