doc: some common options not showing as double hyphen (--)

[young-s-park]

Probably due to some auto formatting, some of the options under "Common Options" is showing as a single long hyphen instead of a double hyphen. E.g. --help or --env-prefix look like there is only a single hyphen

[rsenden]

Example: https://fortify.github.io/fcli/dev_develop/#_env_prefix

Looks like the Asciidoc used to generate this documentation has single dashes instead of double dashes for some of the options, so should be easy to fix: https://github.com/fortify/fcli/blob/cbac6e2e9b413277b09d243b43880cdd4953a593/doc-resources/asciidoc/versioned/index.adoc?plain=1#L77