doc/releases: remove RST-breaking indentation

Add a blank line before an unordered list so that Sphinx stops crying
every time we build the docs.

Signed-off-by: Zac Dover <[email protected]>
(cherry picked from commit dd07927)

Author: zdover23

doc/releases/squid.rst

@@ -17,6 +17,7 @@ Notable Changes
 * RADOS: A new command, `ceph osd rm-pg-upmap-primary-all`, has been added that allows
   users to clear all pg-upmap-primary mappings in the osdmap when desired.
   Related trackers:
+
    - https://tracker.ceph.com/issues/67179
    - https://tracker.ceph.com/issues/66867
 * RBD: Moving an image that is a member of a group to trash is no longer