Update otel4s-core-metrics, ... to 0.15.0

Author: scala-steward

build.sbt

@@ -170,7 +170,7 @@ val osLibVersion = "0.11.4"
 val tethysVersion = "0.29.7"
 val openTelemetryVersion = "1.58.0"
 val openTelemetrySemconvVersion = "1.37.0"
-val otel4s = "0.14.0"
+val otel4s = "0.15.0"
 val slf4jVersion = "1.7.36"
 
 val compileAndTest = "compile->compile;test->test"