doc: fix markdown errors for MD027
doc: fix markdown errors for MD027

MD027 - Multiple spaces after blockquote symbol
https://github.com/markdownlint/markdownlint/blob/master/docs/RULES.md#md027---multiple-spaces-after-blockquote-symbol

Signed-off-by: Ruth Fuchss <90c286bb8b7c8291b9f5a2a1d38dc233728381fe@canonical.com>

stgraber/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,lxc/lxd,stgraber/lxd,lxc/lxd,stgraber/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd