Change release notes filename and add changelog entry (#591)

Preparing release v1.21.0 (#510)

Preparing release v1.20.0 (#492)

Preparing release v1.19.1 (#460)

* Preparing release v1.19.1

* Mark CHANGELOG with bugfix content of this minor release

Preparing release v1.19.0

Remove py37 test from gitlab CI (#414)

Release/v1.14.1 (#333)

* Security fixes and package updates

Preparing release v1.14.0 (#331)

Preparing release v1.13.0 (#330)

Release/v1.12.0 (#318)

* Upgraded Otel dependencies to 1.19.0 and 0.40b0