chore: revert sync changes to compare perf results

Author: GuillaumeLagrange

packages/tinybench-plugin/benches/sample.ts

@@ -35,7 +35,7 @@ bench
   });
 
 (async () => {
-  bench.runSync();
+  await bench.run();
   console.table(bench.table());
 
   const timingBench = withCodSpeed(
@@ -44,6 +44,6 @@ bench
 
   registerTimingBenchmarks(timingBench);
 
-  timingBench.runSync();
+  await timingBench.run();
   console.table(timingBench.table());
 })();