Release prep v2.6.0

[github-actions[bot]]

Automated release-prep through pdk-templates from commit acd3f5acedf21ca339a2a2fa64fb9bdd16c2e324. Please verify before merging:

• [ ] last nightly run is green
• [ ] Changelog is readable and has no unlabeled pull requests
• [ ] Ensure the changelog version and metadata version match