Merge #996: docs: update roadmap in README

5939b9a docs: update roadmap in README (Jose Celano)

Pull request description:

  Remove the "Permanent keys" feature from the roadmap. They have already been implemented.

ACKs for top commit:
  josecelano:
    ACK 5939b9a

Tree-SHA512: 7cf0f7b088b729f9b1648f2b23e6db9fa385b9bb0c7582a86f3199c6140d2796d0d490afe5d74866358190aaed6af07f190d4153d3e20147cc82b156f7b2d236

Author: josecelano

README.md

@@ -24,7 +24,6 @@
 Core:
 
 - [ ] New option `want_ip_from_query_string`. See <https://github.com/torrust/torrust-tracker/discussions/532#issuecomment-1836642956>.
-- [ ] Permanent keys. See <https://github.com/torrust/torrust-tracker/discussions/244>.
 - [ ] Peer and torrents specific statistics. See <https://github.com/torrust/torrust-tracker/discussions/139>.
 
 Persistence: