docs: fix changelog header to consistent size (#66)

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

packages/google-cloud-video-live-stream/CHANGELOG.md

@@ -1,27 +1,27 @@
 # Changelog
 
-### [0.1.4](https://github.com/googleapis/python-video-live-stream/compare/v0.1.3...v0.1.4) (2022-05-22)
+## [0.1.4](https://github.com/googleapis/python-video-live-stream/compare/v0.1.3...v0.1.4) (2022-05-22)
 
 
 ### Documentation
 
 * updated comments to match API behaviors ([#45](https://github.com/googleapis/python-video-live-stream/issues/45)) ([bdc9463](https://github.com/googleapis/python-video-live-stream/commit/bdc9463156a63439ef41621405394042d01f3cb9))
 
-### [0.1.3](https://github.com/googleapis/python-video-live-stream/compare/v0.1.2...v0.1.3) (2022-05-03)
+## [0.1.3](https://github.com/googleapis/python-video-live-stream/compare/v0.1.2...v0.1.3) (2022-05-03)
 
 
 ### Documentation
 
 * **samples:** add sample for creating a channel with a failover backup input ([#37](https://github.com/googleapis/python-video-live-stream/issues/37)) ([9587382](https://github.com/googleapis/python-video-live-stream/commit/958738237c7c055a3a656ce2c3a7964e49d6b6b1))
 
-### [0.1.2](https://github.com/googleapis/python-video-live-stream/compare/v0.1.1...v0.1.2) (2022-04-28)
+## [0.1.2](https://github.com/googleapis/python-video-live-stream/compare/v0.1.1...v0.1.2) (2022-04-28)
 
 
 ### Documentation
 
 * **samples:** add code samples ([#21](https://github.com/googleapis/python-video-live-stream/issues/21)) ([484271d](https://github.com/googleapis/python-video-live-stream/commit/484271de8790e2d9d0d4ea02feb344398317ffe5))
 
-### [0.1.1](https://github.com/googleapis/python-video-live-stream/compare/v0.1.0...v0.1.1) (2022-03-05)
+## [0.1.1](https://github.com/googleapis/python-video-live-stream/compare/v0.1.0...v0.1.1) (2022-03-05)
 
 
 ### Bug Fixes