v6.5.1

[Docs] Add proper factory definition in example (#1688)

* Fix: Bump minimum required Ruby in gemspec (Earlopain).

* Fix: Broken link in `FactoryBot.modify` docs (Matt Brictson).
* Fix: Broken link in `FactoryBot.lint` docs (Anton Dieterle).

6.4.5

* Changed: Support Ruby 3.0+, Rails 6.1+ (Mike Burns).

6.4.4

* Internal: Remove observer dependency (Earlopain).

6.4.3

* Fix: Support models without ID setters in build_stubbed (Olivier Bellone).
* Fix: Explicit observer dependency (Oleg Antonyan).
* Internal: Add Rails 7.1 to CI (Olivier Bellone).
* Internal: Bump github actions/checkout to v4 (Lorenzo Zabot)
* Internal: Stop passing disable-error_highlight in CI (Mike Burns).
* Internal: Relax the exception message check (Mike Burns).