CI: Intermittent failure in pidfile

[Keno]

FileWatching                                     (4) \|         failed at 2022-10-07T04:53:37.070
--
  | Test Failed at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-aarch64-4.0/build/default-macmini-aarch64-4-0/julialang/julia-master/julia-f1b05c1acf/share/julia/stdlib/v1.9/FileWatching/test/pidfile.jl:224
  | Expression: 8 < t < 20
  | Evaluated: 8 < 3.03425575 < 20

https://buildkite.com/julialang/julia-master/builds/16714#0183b148-8079-4a92-a60a-2f78d8fbf1e5

Note that this is a different intermittent failure than #45982