docs: update changelog for 2.6.3 (#4119)
docs: update changelog for 2.6.3 (#4119)


soyuka/core,api-platform/core,vincentchalamon/core,vincentchalamon/core,vincentchalamon/core,soyuka/core,vincentchalamon/core,soyuka/core,api-platform/core,api-platform/core,soyuka/core,api-platform/core