[submodule] Update submodule for sonic-sairedis (#9354)

sai-redis submodule update:

69517ba [lgtm] Add gmock libs to lgtm (#973)
a7c8cfa [FlexCounter] Add trap flow counter support (#954)
3304daa [vslib]: Add MACsec xpn support (#924)
a3143da Add ACL_TABLE object to break-before-make list (#970)
05a06a4 Update SAI with saiserver fix (#966)
e4180e0 [VS test] Increase test timeout (#967)
70e6491 Fix hung issue when installing linux kernel modules (#969)