Update Freebuff access information

[Madacool01]

Updated access details for Freebuff in README.

[codebuff-team]

Thanks for taking a shot at improving the README, but this change introduces information that doesn't match the actual product. The original text mentions "MiMo 2.5 and Ox Alpha with three one-hour sessions per day, earnable up to seven" — your edit replaces this with different model names ("DeepSeek V4 Flash", "GPT-5.6 Luna", "DeepSeek V4 Pro") and different session limits ("Unlimited", "Five... up to seven") that don't correspond to any models or limits actually referenced elsewhere in this repo or product. This reads as fabricated/hallucinated content rather than a factual correction.

A documentation PR needs to reflect the real, current state of the product. If you have evidence that Freebuff's free-tier model lineup has changed (e.g. a changelog entry, an announcement, or actual behavior you observed), please cite it in the PR description. As-is, this looks like invented model names that could mislead users about what they'll actually get.

Also minor: the diff leaves an extra blank line after the bullet list.

Closing this since it would introduce incorrect information into the README rather than fixing anything.

[Madacool01]

Thanks for the review! I completely understand your concern.
To clarify, I wasn't fabricating anything: When I logged into the standard interface, those were the exact models actively displayed on my dashboard the day I opened this PR.
I'll also make sure to watch out for extra blank lines in the future. Thanks for keeping the repo clean!