docs: add changelog for 6.0.0-beta.7

docs: add changelog for 5.2.8

docs: add changelog for 6.0.0-beta.6

docs: add changelog for 5.2.7

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