SshAgentCredentialsTests.Success failed in CI

[tmds]

Failure

  Failed Tmds.Ssh.Tests.SshAgentCredentialsTests.Success [8 ms]
  Error Message:
   Assert.Equal() Failure: Values differ
Expected: 0
Actual:   2
  Stack Trace:
     at Tmds.Ssh.Tests.SshAgentCredentialsTests.SshAgent.Add(String keyFile) in /home/runner/work/Tmds.Ssh/Tmds.Ssh/test/Tmds.Ssh.Tests/SshAgentCredentialsTests.cs:line 79
   at Tmds.Ssh.Tests.SshAgentCredentialsTests.Success() in /home/runner/work/Tmds.Ssh/Tmds.Ssh/test/Tmds.Ssh.Tests/SshAgentCredentialsTests.cs:line 25
--- End of stack trace from previous location ---

We may need a small time out between starting the SSH Agent and adding keys to it.