Update submodule sonic-utilities (#15770)

sonic-utilities submodule update

#### Why I did it
sonic-utilities submodule update:
```
399b1e3 2023-07-06 [202012][Show][BGP] Show BGP Change for no neighbor scenario (#2886)
7b47641 2023-07-10 [[202012] [TACACS+] Add config command for AAA authorization and accounting. (#1889)
```
##### Work item tracking
- Microsoft ADO **(number only)**:24433713

#### How I did it
Update sonic-utilities submodule.

#### How to verify it
Pass all test case.

#### Tested branch (Please provide the tested image version)
- [ ] SONiC.202012-15703.306864-1ef589c19