[submodule]: update sonic-utilities

[xumia]

Why I did it

Commits:
a12ce13 [201911][port2alias]: Include mock port_config.ini files (#2021)
6597c25 Fix show ip bgp nei command rw required issue (#2011)
62a43f0 Fix "show ip bgp network" (#1992)
77cb018 [generate_dump][201911] Remove secrets from dump files (#1960)
3af1977 [port2alias][201911]: Update unit test to test port2alias (#1954)

How I did it

How to verify it

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106

Description for the changelog

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

[xumia]

@SuvarnaMeenakshi, could you please help take a look the UT failure? Is it relative to the change sonic-net/sonic-utilities#1954

https://dev.azure.com/mssonic/build/_build/results?buildId=65677&view=logs&jobId=88ce9a53-729c-5fa9-7b6e-3d98f2488e3f&j=88ce9a53-729c-5fa9-7b6e-3d98f2488e3f&t=8d99be27-49d0-54d0-99b1-cfc0d47f0318

port_config_file = '/sonic/src/sonic-utilities/deb_dist/sonic-utilities-1.2/sonic-utilities-tests/mock_tables/port_config.ini'

    def parse_port_config_file(port_config_file):
        ports = {}
        port_alias_map = {}
        port_alias_asic_map = {}
        # Default column definition
        titles = ['name', 'lanes', 'alias', 'index']
>       with open(port_config_file) as data:
E       IOError: [Errno 2] No such file or directory: '/sonic/src/sonic-utilities/deb_dist/sonic-utilities-1.2/sonic-utilities-tests/mock_tables/port_config.ini'