doc: fix broken links in benchmark README

PR-URL: #32121
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

Author: Trott

benchmark/README.md

@@ -76,17 +76,17 @@ writing benchmarks.
 
 ### `createBenchmark(fn, configs[, options])`
 
-See [the guide on writing benchmarks](../doc/guides/contributing/writing-and-running-benchmarks.md#basics-of-a-benchmark).
+See [the guide on writing benchmarks](../doc/guides/writing-and-running-benchmarks.md#basics-of-a-benchmark).
 
 ### `default_http_benchmarker`
 
 The default benchmarker used to run HTTP benchmarks.
-See [the guide on writing HTTP benchmarks](../doc/guides/contributing/writing-and-running-benchmarks.md#creating-an-http-benchmark).
+See [the guide on writing HTTP benchmarks](../doc/guides/writing-and-running-benchmarks.md#creating-an-http-benchmark).
 
 ### `PORT`
 
 The default port used to run HTTP benchmarks.
-See [the guide on writing HTTP benchmarks](../doc/guides/contributing/writing-and-running-benchmarks.md#creating-an-http-benchmark).
+See [the guide on writing HTTP benchmarks](../doc/guides/writing-and-running-benchmarks.md#creating-an-http-benchmark).
 
 ### `sendResult(data)`