Remove v2-prefix from other documentation where appropriate

* Added a changelog file

* Merge branch 'master' of github.com:haskell/cabal into remove-v2-from-docs

* Implemented PR feedback

* Reverted changes to regression tests

* Update CONTRIBUTING.md

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

* Update bootstrap/bootstrap.py

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

* Apply suggestions from code review

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

* Merge branch 'master' into remove-v2-from-docs

* Removed changelog entry

* Merge branch 'remove-v2-from-docs' of github.com:aspidites/cabal into remove-v2-from-docs

* Reverted bootstrap/README.md

* Merge branch 'master' into remove-v2-from-docs

Co-authored-by: ulysses4ever <6832600+ulysses4ever@users.noreply.github.com>