docs(changelog): changelog for v2.11 release

Generated this change-log using below command:
npm run release -- --skip.commit --skip.tag --release-as 2.11.0

Change-Id: I34c7b342549781057da1b18116500f110bc3f5ad
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Signed-off-by: Juan Pablo Conde <JuanPablo.Conde@arm.com>
8 files changed