fix a typo

Author: amin1377

libs/librrgraph/src/utils/alloc_and_load_rr_indexed_data.cpp

@@ -351,7 +351,7 @@ static void load_rr_indexed_data_base_costs(const RRGraphView& rr_graph,
     rr_indexed_data[RRIndexedDataId(SOURCE_COST_INDEX)].base_cost = delay_normalization_fac;
     rr_indexed_data[RRIndexedDataId(SINK_COST_INDEX)].base_cost = 0.;
     rr_indexed_data[RRIndexedDataId(OPIN_COST_INDEX)].base_cost = delay_normalization_fac;
-    // IF the SPEC_CPU flag is set, we need to make sure that all floating point numbers are perfectly representable in
+    // If the SPEC_CPU flag is set, we need to make sure that all floating point numbers are perfectly representable in
     // binary format. Thus, we changed the IPIN_COST_INDEX base cost from 0.95 to 0.875.
     // This number is perfectly representable in a binary mantissa (without round-off) so we can get the same routing result on different platforms.
     // Since the router cost calculations and heap use floating point numbers, normally we get slightly different round off with different compiler settings,