[submodule]: Update sonic-swss (sonic-net#7478)

[flex-counters] Delay flex counters stats init for faster boot time (sonic-net/sonic-swss#1646)
[routeorch] Add support for blackhole routes (sonic-net/sonic-swss#1723)
Update pool sizes during initialization from timer only (sonic-net/sonic-swss#1708)

Signed-off-by: Shlomi Bitton <[email protected]>