Update sonic-swss submodule (#8057)

[flex-counters] Delay flex counters stats init for faster boot time (sonic-net/sonic-swss#1803)
[mirror] Detach session dst ip from route orch LPM calculation regardless of session status at session CONFIG DB removal (sonic-net/sonic-swss#1800)
[Dynamic Buffer Calc] Support dynamic buffer calculation on top of port auto negotiation (sonic-net/sonic-swss#1762)
[neighorch] VOQ encap index change handling (sonic-net/sonic-swss#1729)
[neighorch] Mac for voq neighbors in VS platforms (sonic-net/sonic-swss#1724)
[acl mirror action] Mirror session ref count fix at acl rule attachment (sonic-net/sonic-swss#1761)

Author: shlomibitton