fix a typo: add .flows to noc traffic file specified in vpr_noc_clique_topology

Author: amin1377

vtr_flow/tasks/regression_tests/vtr_reg_nightly_test5/vpr_noc_nearest_neighbor_topology/config/config.txt

@@ -18,7 +18,7 @@ circuit_list_add=complex_64_noc_nearest_neighbor.blif
 arch_list_add=stratixiv_arch.timing_with_a_embedded_10X10_mesh_noc_topology.xml
 
 # Add NoC Traffic Patterns to list to sweep
-noc_traffic_list_add=complex_64_noc_nearest_neighbor
+noc_traffic_list_add=complex_64_noc_nearest_neighbor.flows
 
 # Parse info and how to parse
 parse_file=vpr_noc.txt