Update git submodules

* Update devstack from branch 'master'
  to feb248232842f5f299a34f433a7603cffecf3e08
  - Merge "Drop logic for CentOS (Stream) 8"
  - Drop logic for CentOS (Stream) 8

    Change-Id: I528652ced464fadd565e16e89a7e0ef826d42611
    Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

diff --git a/devstack b/devstack
index bd160a3d2a33ba383c06f895ef819b3621290d05..feb248232842f5f299a34f433a7603cffecf3e08 160000 (submodule)
--- a/devstack
+++ b/devstack
@@ -1 +1 @@
-Subproject commit bd160a3d2a33ba383c06f895ef819b3621290d05
+Subproject commit feb248232842f5f299a34f433a7603cffecf3e08