docs(changelog): generate changelog

For future reference, this changelog was generated with the following
command:

    npm run release -- --skip.commit --skip.tag --release-as 2.6.0

Change-Id: Idf6be5c3be15ddfdb1d32fafb9e0e4b399b269f3
Signed-off-by: Chris Kay <chris.kay@arm.com>
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
2 files changed