test: mark `test-http2-session-timeout` as flake on ARM
Refs: https://github.com/nodejs/node/issues/20628
Please
CI: https://ci.nodejs.org/job/node-test-pull-request/17810/
https://ci.nodejs.org/job/node-test-pull-request/17812/
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines