Distro release 1.6.13

[Jeremy Voss (jeremydvoss)]

Description

Distro release 1.6.13. This release updates to the latest version of OTel.

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[Jeremy Voss (jeremydvoss)]

Waiting on From Sources Test: https://msazure.visualstudio.com/One/_build/results?buildId=132030976&view=results

[Copilot]

Pull Request Overview

This PR releases distro version 1.6.13 for the Azure Monitor OpenTelemetry package, updating to the latest OpenTelemetry version and removing Python 3.8 support. The release finalizes the changelog entry with the official release date.

Key Changes:

• Updates the changelog to mark version 1.6.13 as released with date 2025-07-30
• Removes empty changelog sections for a cleaner release format