Update disputes subsytems section. (#6329)

* Update disputes subsytems section.

* Update roadmap/implementers-guide/src/node/disputes/README.md

Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>

* Update roadmap/implementers-guide/src/node/disputes/README.md

Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>

* Update roadmap/implementers-guide/src/node/disputes/README.md

Co-authored-by: ordian <write@reusable.software>

* Update roadmap/implementers-guide/src/node/disputes/README.md

Co-authored-by: ordian <write@reusable.software>

* Review feedback.

Co-authored-by: eskimor <eskimor@no-such-url.com>
Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>
Co-authored-by: ordian <write@reusable.software>