deps: update dependency io.opentelemetry:opentelemetry-bom to v1.39.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.opentelemetry:opentelemetry-bom	1.38.0 -> 1.39.0

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Release Notes

open-telemetry/opentelemetry-java (io.opentelemetry:opentelemetry-bom)

v1.39.0

API

Incubator

• BREAKING: Refactor ExtendedTracer, ExtendedSpanBuilder to reflect incubating API conventions
  (#​6497)

SDK

Exporter

• BREAKING: Serve prometheus metrics only on /metrics by default. To restore the previous behavior
  and serve metrics on all paths, override the default handler
  as demonstrated here.
  (#​6476)
• Make OTLP exporter memory mode API public
  (#​6469)
• Speed up OTLP string marshaling using sun.misc.Unsafe
  (#​6433)
• Add exporter data classes for experimental profiling signal type.
  (#​6374)
• Start prometheus http server with daemon thread
  (#​6472)
• Update the Prometheus metrics library and improve how units are included in metric names.
  (#​6473)
• Remove android animalsniffer check from prometheus exporter
  (#​6478)

Extensions

• Load file config YAML using core schema, ensure that env var substitution retains string types.
  (#​6436)
• Define dedicated file configuration SPI ComponentProvider
  (#​6457)

Tooling

• Normalize timestamps and file ordering in jars, making the outputs reproducible
  (#​6471)
• GHA for generating the post-release pull request
  (#​6449)

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