Update dependency io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha to v2.8.0-alpha#1456

jack-berg merged 2 commits intomainopen-telemetry/opentelemetry-java-contrib:mainfrom

renovate/otelinstrumentationversionopen-telemetry/opentelemetry-java-contrib:renovate/otelinstrumentationversionCopy head branch name to clipboard