Fix parsing Rust benchmark lines that include MB/s

Source: benchmark-action/github-action-benchmark#50

Author: seanmonstar

src/extract.ts

@@ -250,7 +250,7 @@ function extractCargoResult(output: string): BenchmarkResult[] {
     const ret = [];
     // Example:
     //   test bench_fib_20 ... bench:      37,174 ns/iter (+/- 7,527)
-    const reExtract = /^test ([\w/]+)\s+\.\.\. bench:\s+([0-9,]+) ns\/iter \(\+\/- ([0-9,]+)\)$/;
+    const reExtract = /^test ([\w/]+)\s+\.\.\. bench:\s+([0-9,]+) ns\/iter \(\+\/- ([0-9,]+)\)(?: = \d+ MB\/s)?$/;
     const reComma = /,/g;
 
     for (const line of lines) {