mention the 59th second timeperiod issue in the docs

What does this MR do?

Just mention the 59th second time period issue in the docs to let the interested user know about it.

Why was this MR needed?

Just improving the docs.

Does this MR meet the acceptance criteria?

  • Documentation created/updated
  • Tests
    • Added for this feature/bug
    • All builds are passing
  • Branch has no merge conflicts with master (if you do - rebase it please)

What are the relevant issue numbers?

Closes #2170