Add note to tutorial.md explaining pain point

[JarredAllen]

Add note explaining that a minimum font size in your browser can cause improper text rendering (as happened to me in issue #1532 the other day).

Hopefully this will help others avoid/resolve this pain point that I hit.

Contributor checklist:

Most of these items don't apply since I'm just proposing a minor addition to the documentation

Proposed changes

• Minor addition to documentation in tutorial (explained above)

[JarredAllen]

Are there any updates on the consideration of this? It would have improved my experience greatly when initially trying to use this library if this change was present.

[bjarthur]

thanks!