message: Added criterion-perf-events to README.md
diff: @@ -142,3 +142,4 @@ Criterion.<span></span>rs is dual licensed under the Apache 2.0 license and the
  ### Criterion.rs Extensions
  - [criterion-cycles-per-byte](https://crates.io/crates/criterion-cycles-per-byte) - A custom-measurement plugin that counts the number of CPU cycles used by the benchmark
  +- [criterion-perf-events](https://crates.io/crates/criterion-perf-events) - A custom-measurement plugin that counts perf events created by the benchmark
  