update the changelog

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
Merge pull request #185 from alfredodeza/8302

default to Firefly when installing
1.5.2
Write correct 'mon_host' with IPv6 addresses

When the IP-address from a monitor is a IPv6 address, encapsulate
it with [ and ]

Fixes: #8309
Merge pull request #186 from wido/ipv6

Two IPv6 related fixes
When adding an apt repo, run "apt-get update" unconditionally

Signed-off-by: Dan Mick <dan.mick@inktank.com>
Merge pull request #187 from ceph/wip-apt-update

When adding an apt repo, run "apt-get update" unconditionally