test: increase Fibonacci argument to 40

Fixes: https://github.com/nodejs/node/issues/34031

PR-URL: https://github.com/nodejs/node/pull/42055
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Akhil Marsonya <akhil.marsonya27@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Ricky Zhou <0x19951125@gmail.com>

test/fixtures/workload/fibonacci.js

@@ -4,12 +4,5 @@ function fib(n) {
   return fib(n - 1) + fib(n - 2);
 }
 
-// This is based on emperial values - in the CI, on Windows the program
-// tend to finish too fast then we won't be able to see the profiled script
-// in the samples, so we need to bump the values a bit. On slower platforms
-// like the Pis it could take more time to complete, we need to use a
-// smaller value so the test would not time out.
-const FIB = process.platform === 'win32' ? 40 : 30;
-
-const n = parseInt(process.env.FIB) || FIB;
+const n = parseInt(process.env.FIB, 10) || 40;
 process.stdout.write(`${fib(n)}\n`);