[Mellanox] Update SAI (sonic-net#2686)

New SAI fixes getting of queue buffer profile

Signed-off-by: Andriy Moroz <c_andriym@mellanox.com>

Author: andriymoroz-mlnx

platform/mellanox/mlnx-sai.mk

@@ -1,7 +1,7 @@
 # Mellanox SAI
 
 MLNX_SAI_VERSION = SAIRel1.13.4-master
-MLNX_SAI_REVISION = f3e389f1ba9535fdd6afb134897683b65d1ad4e7
+MLNX_SAI_REVISION = 783d040465fb31771bcb9ec3d655d053e88b1bf0
 
 export MLNX_SAI_VERSION MLNX_SAI_REVISION