[jbjorkang]

When attempting to use the flatpak operation, I noted the examples made mention of flatpak.package, when in reality the operation should be used as:

flatpak.packages(packages: 'str | list[str] | None' = None, remote: 'str | None' = None, present=True,
         **kwargs,
    )

In doing so I also rewrote the remote text to make it more succinct.

• Pull request is based on the default branch (3.x at this time)
• Pull request includes tests for any new/updated operations/facts
• Pull request includes documentation for any new/updated operations/facts
• Tests pass (see scripts/dev-test.sh)
• Type checking & code style passes (see scripts/dev-lint.sh)
• Pull request title follows the
  conventional commits format