Bump io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha from 2.6.0-alpha to 2.7.0-alpha in /other-examples/java

Bump io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha from 2.6.0-alpha to 2.7.0-alpha in /other-examples/java #853