test: set test-macos-app-sandbox as flaky

Author: anonrig

test/parallel/parallel.status

@@ -59,6 +59,8 @@ test-http-server-headers-timeout-keepalive: PASS,FLAKY
 test-http-server-request-timeout-keepalive: PASS,FLAKY
 # https://github.com/nodejs/node/issues/50243
 test-inspector-async-stack-traces-set-interval: PASS, FLAKY
+# https://github.com/nodejs/node/issues/54811
+test-macos-app-sandbox: PASS, FLAKY
 
 [$arch==arm || $arch==arm64]
 # https://github.com/nodejs/node/pull/31178