[Error] Documentation: Install flag `--next` does not exist.

[plattrap]

Describe the bug
Instructions at https://distrobox.it/#curl-or-wget suggest a --next flag to the install script.

To Reproduce

$ curl -s https://raw.githubusercontent.com/89luca89/distrobox/main/install | sh -s -- --next --prefix ~/.local
Error: unknown argument --next
install --prefix /usr/local

Options:
        --prefix/-P:    base path where files will be deployed
                        (default: /usr/local if root, ~/.local otherwise)
        --version/-V:   release tag to install (default: 2.0.0-rc.1)
        --no-color:     disable color formatting
        --help/-h:      show this message
        -v/--verbose:   show more verbosity

Requires: tar plus either curl or wget. Detected architecture must be
amd64 or arm64 (matching the published release artefacts).

To uninstall, use the companion ./uninstall script.
(23) Failed writing body

Expected behavior

• Remove --next from the documentation.
• Add --version instead?