website: fix workers benchmark links (denoland#2370)

Signed-off-by: Stephan Renatus <srenatus@chef.io>

website/benchmarks.html

@@ -108,12 +108,12 @@ <h3 id="exec-time">Execution time <a href="#exec-time">#</a></h3>
           >tests/003_relative_import.ts</a
         >,
         <a
-          href="https://github.com/denoland/deno/blob/master/tests/worker_round_robin_bench.ts"
-          >tests/worker_round_robin_bench.ts</a
+          href="https://github.com/denoland/deno/blob/master/tests/workers_round_robin_bench.ts"
+          >tests/workers_round_robin_bench.ts</a
         >, and
         <a
-          href="https://github.com/denoland/deno/blob/master/tests/worker_startup_bench.ts"
-          >tests/worker_startup_bench.ts</a
+          href="https://github.com/denoland/deno/blob/master/tests/workers_startup_bench.ts"
+          >tests/workers_startup_bench.ts</a
         >. For deno to execute typescript, it must first compile it to JS. A
         warm startup is when deno has a cached JS output already, so it should
         be fast because it bypasses the TS compiler. A cold startup is when deno