Update git submodules

* Update xstatic-font-awesome from branch 'master'
  to 8c02750f5bb02ab67b25cacd029155a9c2d460c6
  - Step 2: Remove Project Content- Retire xstatic-font-awesome
    
    As discussed in the horizon weekly meeting[1] and announced on
    open-discuss ML [2], Horizon team decided to retire
    xstatic-font-awesome project from the OpenStack umbrella and
    contributors from MoinMoin going to maintain this project under
    python-xstatic[3]. This patch is step 2 as mentioned in retiring
    a project guide[4].
    
    [1] https://meetings.opendev.org/irclogs/%23openstack-horizon/%23openstack-horizon.2023-01-18.log.html#t2023-01-18T15:05:56
    [2] https://lists.openstack.org/pipermail/openstack-discuss/2023-January/031884.html
    [3] https://github.com/xstatic-py/xstatic-font-awesome
    [4] https://docs.opendev.org/opendev/infra-manual/latest/drivers.html#step-2-remove-project-content
    
    Depends-On: https://review.opendev.org/c/openstack/project-config/+/871703
    
    Change-Id: I6c3d5505f3fe803649e16d182f032d6afe9840d4
    
  - OpenDev Migration Patch
    
    This commit was bulk generated and pushed by the OpenDev sysadmins
    as a part of the Git hosting and code review systems migration
    detailed in these mailing list posts:
    
    http://lists.openstack.org/pipermail/openstack-discuss/2019-March/003603.html
    http://lists.openstack.org/pipermail/openstack-discuss/2019-April/004920.html
    
    Attempts have been made to correct repository namespaces and
    hostnames based on simple pattern matching, but it's possible some
    were updated incorrectly or missed entirely. Please reach out to us
    via the contact information listed at https://opendev.org/ with any
    questions you may have.

xstatic-font-awesome

@@ -1 +1 @@
-Subproject commit b8a162a5fce8b20ba079a639062891af41d407c0
+Subproject commit 8c02750f5bb02ab67b25cacd029155a9c2d460c6