[submodule] Advance sonic-swss pointer

Update sonic-swss submodule pointer to include the following:
* a2a483d [acl] Add new ACL key BTH_OPCODE and AETH_SYNDROME  ([sonic-net#2617](sonic-net/sonic-swss#2617))
* 9d1f66b [bfdorch] add local discriminator to state DB ([sonic-net#2629](sonic-net/sonic-swss#2629))
* c54b3d1 Vxlan tunnel endpoint custom monitoring APPL DB table. ([sonic-net#2589](sonic-net/sonic-swss#2589))
* 7f03db2 Fix potential risks ([sonic-net#2516](sonic-net/sonic-swss#2516))
* 383ee68 [refactor]Refactoring sai handle status ([sonic-net#2621](sonic-net/sonic-swss#2621))
* cd95972 Fix issue 13341 ARP entry can be out of sync between kernel and APPL_DB if multiple updates are received from RTNL ([sonic-net#2619](sonic-net/sonic-swss#2619))
* a01470f Remove TODO comments that are no longer relevant ([sonic-net#2622](sonic-net/sonic-swss#2622))
* d058390 Changed the BFD default detect multiplier to 10x ([sonic-net#2614](sonic-net/sonic-swss#2614))
* d78b528 [MuxOrch] Enabling neighbor when adding in active state ([sonic-net#2601](sonic-net/sonic-swss#2601))
* 4ebdad1 [routesync] Fix for stale dynamic neighbor ([sonic-net#2553](sonic-net/sonic-swss#2553))
* 8857f92 Added new attributes for Vnet and Vxlan ecmp configurations. ([sonic-net#2584](sonic-net/sonic-swss#2584))
* b6bbc3e Revert [voq][chassis]Add show fabric counters port/queue commands (2522) ([sonic-net#2611](sonic-net/sonic-swss#2611))
* 52406e2 Add missing parameter to on_switch_shutdown_request method. ([sonic-net#2567](sonic-net/sonic-swss#2567))
* 4ac9ad9 Increase diff coverage to 80% ([sonic-net#2599](sonic-net/sonic-swss#2599))
* 8a0bb36 Handle Mac address 'none' ([sonic-net#2593](sonic-net/sonic-swss#2593))
* f496ab3 [vstest] Only collect stdout of orchagent_restart_check in vstest ([sonic-net#2597](sonic-net/sonic-swss#2597))
* 1dab495 Avoid aborting orchagent when setting TUNNEL attributes ([sonic-net#2591](sonic-net/sonic-swss#2591))
* 4395cea Fix neighbor doesn't update all attribute ([sonic-net#2577](sonic-net/sonic-swss#2577))

Signed-off-by: dprital <[email protected]>

Author: dprital