Fix integration tests concurrent CI runs
Fix integration tests concurrent CI runs

Pick a (random) free port for remote debugging, which is used internally
by chromedriver. This should fix the flaky windows build.

leafo/itchio-app,itchio/itch,itchio/itch,leafo/itchio-app,itchio/itch,itchio/itchio-app,itchio/itch,leafo/itchio-app,itchio/itch,itchio/itchio-app,itchio/itch,itchio/itchio-app