Rust Say exercise states max value of i64 instead of u64 in docs

Sorry if this is the wrong place, not sure where to post this since the GitHub repo doesn’t accept community contributions anymore, so I assume I just post it here?

In the exercise “say” - at the bottom it states the following:

Add capability of converting up to the max value for u64: 9,223,372,036,854,775,807.

However, 9,223,372,036,854,775,807 is the max value of i64, not u64.
The max value of u64 is as written in the test cases, 18,446,744,073,709,551,615.

Can this text be updated?

On the side, I had also opened this PR a while back but it was closed. Any thoughts on this?