docs: add changelog for 6.0.0-beta.5

docs: add changelog for 5.2.6

docs: add changelog for 6.0.0-beta.4

docs: add changelog for 5.2.5

docs: add changelog for 6.0.0-beta.3

docs: add changelog for 5.2.4

docs: add changelog for 6.6.0-beta.2

docs: add changelog for 5.2.3

docs: add changelog for 6.0.0-beta.1

docs: add changelog for 5.2.2