fix: docs links and add wait_time override example

[cidersage]

Summary

Fix broken documentation link in the example readmes; add wait_time to the custom example as a means to address timeout issues.

How did you test this change?

Local test; adding time_wait overrides the default:

  # module.az_config.time_sleep.wait_time will be updated in-place
  ~ resource "time_sleep" "wait_time" {
      ~ create_duration = "20s" -> "100s"
        id              = "2023-08-31T14:49:09Z"
        # (1 unchanged attribute hidden)

Issue

https://lacework.atlassian.net/browse/LINK-2400

[afiune]

[cidersage]

Closing this PR without merge; will re-submit with signed commits.