Update git submodules

* Update releases from branch 'master'
  to 45309b7e794bdb71c84eadec4f866a149e585705
  - Merge "Move unmaintained/xena to EOL"
  - Move unmaintained/xena to EOL

    As announced on mailing list [1], this patch moves unmaintained/xena
    to End of Life.

    [1] https://lists.openstack.org/archives/list/openstack-discuss@lists.openstack.org/thread/N24CYAJMLVJMAJMUE4RA5U7KOL7LABOW/

    Change-Id: Ibeef4fe739e96176f5e449aef6e3d6b8129e1147
    Signed-off-by: Előd Illés <elod.illes@est.tech>

diff --git a/releases b/releases
index 51ca1cf9dac1282aeb63fdb94baaa05a4a76086a..45309b7e794bdb71c84eadec4f866a149e585705 160000 (submodule)
--- a/releases
+++ b/releases
@@ -1 +1 @@
-Subproject commit 51ca1cf9dac1282aeb63fdb94baaa05a4a76086a
+Subproject commit 45309b7e794bdb71c84eadec4f866a149e585705