Update Github CHANGELOG for initial release.

PiperOrigin-RevId: 610758474

Author: Googler

CHANGELOG.md

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+# Changelog
+
+<!--
+
+Changelog follow the https://keepachangelog.com/ standard (at least the headers)
+
+This allows:
+
+* auto-parsing release notes during the automated releases from github-action:
+  https://github.com/marketplace/actions/pypi-github-auto-release
+* Have clickable headers in the rendered markdown
+
+To release a new version (e.g. from `1.0.0` -> `2.0.0`):
+
+* Create a new `# [0.0.1] - YYYY-MM-DD` header and add the current
+  `[Unreleased]` notes.
+* At the end of the file:
+  * Define the new link url:
+  `[0.0.1]: https://github.com/google/cloud_tpu_goodput/compare/v1.0.0...v2.0.0`
+  * Update the `[Unreleased]` url: `v1.0.0...HEAD` -> `v2.0.0...HEAD`
+
+-->
+
+## [Unreleased]
+
+## [0.0.1] - 2024-02-26
+* Initial release of ML Goodput Measurement PyPi package
+* Feature: Contains the Goodput module which allows logging and retrieval of training job's overall productive Goodput
+
+[1.0.0]: https://github.com/google/cloud_tpu_goodput/releases/tag/v1.0.0