test: mark test-cluster-shared-leak flaky

test-cluster-shared-leak is flaky on Windows. Refs: #3956 PR-URL: #4162 Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Roman Klauke <[email protected]> Reviewed-By: Minwoo Jung <[email protected]>

Author: Trott

test/parallel/parallel.status

@@ -7,9 +7,10 @@ prefix parallel
 [true] # This section applies to all platforms
 
 [$system==win32]
+test-child-process-fork-regr-gh-2847 : PASS,FLAKY
 test-cluster-net-send : PASS,FLAKY
+test-cluster-shared-leak : PASS,FLAKY
 test-tls-ticket-cluster : PASS,FLAKY
-test-child-process-fork-regr-gh-2847 : PASS,FLAKY
 
 [$system==linux]
 test-http-client-timeout-event : PASS,FLAKY