Fix benchmark parsing

#307 changes the output
format of the benchmarks adding an 'avg'.
This broke the parsing of the benchmarks that is required for the Github
benchmark action.
This commit fixes that parsing and restores the benchmarking in CI.

Signed-off-by: Matthias J. Kannwischer <[email protected]>

Author: mkannwischer

scripts/tests

@@ -567,7 +567,7 @@ class Tests:
                         {
                             "name": f"{schemeStr} {primitive}",
                             "unit": "cycles",
-                            "value": d[f"{primitive} cycles"],
+                            "value": d[f"{primitive} cycles (avg)"],
                         }
                     )