Use updated version of Global SHPC

Trajectories/Tests/perf_tests.json

 {
    "Perf_segments": {
-      "description": "Performance test with adjustable size of input. edgelist_head comes from head of Global_1993_2020_graph_anti/edgelist.csv.",
+      "description": "Performance test with adjustable size of input. edgelist_head comes from head of Global_1993_2021/Graph_anti/edgelist.csv.",
       "command": [
          "$src_dir/Trajectories/segments.py",
          "$PWD/edgelist_head.csv",
@@ -11,7 +11,7 @@
       "description": "Performance test with adjustable size of input.",
       "command": [
          "$src_dir/Trajectories/cost_function.py",
-         "$PWD/Global_1993_2020_SHPC",
+         "$PWD/Global_1993_2021/SHPC",
          "Anticyclones",
          "$tests_old_dir/Perf_segments/segments.gt",
          "segments_cost_functions.gt"