Fix misleading doc string in quint8.h

[xiorcale]

The doc string let suppose that quint8 is for singed 8 bit values.

[facebook-github-bot]

Hi @xiorcale!

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have you on file.

In order for us to review and merge your code, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

If you have received this in error or have any questions, please contact us at cla@fb.com. Thanks!

[dr-ci]

💊 CI failures summary and remediations

As of commit afdf0e9 (more details on the Dr. CI page):

---

• 1/1 failures possibly* introduced in this PR
  • 1/1 non-CircleCI failure(s)

---

Extra GitHub checks: 1 failed

• Failed: GitHub Actions - flake8-py3

---

This comment was automatically generated by Dr. CI (expand for details).

Follow this link to opt-out of these comments for your Pull Requests.

Please report bugs/suggestions on the GitHub issue tracker or post in the (internal) Dr. CI Users group.

See how this bot performed.

This comment has been revised 1 time.

[facebook-github-bot]

@mrshenli has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[facebook-github-bot]

@mrshenli merged this pull request in 6a37582.