test: set test-http2-socket-close as flaky

PR-URL: #54802
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matthew Aitken <maitken033380023@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: anonrig

test/parallel/parallel.status

@@ -33,6 +33,8 @@ test-runner-watch-mode-complex: PASS, FLAKY
 test-async-context-frame: PASS, FLAKY
 # https://github.com/nodejs/node/issues/54534
 test-runner-run-watch: PASS, FLAKY
+# https://github.com/nodejs/node/issues/54819
+test-http2-socket-close: PASS, FLAKY
 
 # Windows on ARM
 [$system==win32 && $arch==arm64]