test: mark test-worker-prof flaky on arm

Refs: #26401 (comment)

PR-URL: #32826
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>

test/sequential/sequential.status

@@ -33,3 +33,5 @@ test-buffer-creation-regression: SKIP
 test-perf-hooks: SKIP
 
 [$arch==arm]
+# https://github.com/nodejs/node/issues/26401#issuecomment-613095719
+test-worker-prof: PASS, FLAKY