[submodule]: Advance sonic-utilities

[nazariig]

Signed-off-by: Nazarii Hnydyn nazariig@mellanox.com

- What I did

• Advanced sonic-utilities submodule

- How I did it

- How to verify it

- Description for the changelog

Commits on Mar 24, 2020
[config] Add sflow to _reset_failed_services (#850) 04648f5
[fwutil]: Use overlay driver when mounting next image filesystem (#825) 668c116
Fix for adding L3 interface to Vlan group (#826) 6e3679b
[fwutil]: Fix component table layout. (#831) 30adcbd 

- A picture of a cute animal (not mandatory but encouraged)

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   //////   ' \/ `   ---
  //// / // :    : ---
 // /   /  /`    '--
//          //..\\
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           '//||\\`
             ''``

[nazariig]

retest this please