Advance sonic-utilities submodule (#15009)

Why I did it
Advance sonic-utilities submodule head
Added below commits:
878be48e kellyyeh Wed May 10 15:21:52 2023 -0700 Revert "[warm-reboot] Use kexec_file_load instead of kexec_load when available
094513f8 Vaibhav Hemant Dixit Tue May 9 13:03:52 2023 -0700 [202012] LAG keepalive script to reduce lacp session wait during warm-reboot

Work item tracking
Microsoft ADO (number only): 23687678
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kellyyeh 2023-05-24 16:09:38 -07:00 committed by GitHub
parent 52e33258dc
commit 7abddb42b0
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Subproject commit d20fc3c8721c758d9a009095c682682f437e9c96
Subproject commit 878be48e38f10bc52409ece52712cf3d509e894c