Docs: inform that Goojprt QR203 thermal printer is unable to print non-ASCII chars

[tadeubas]

Added info about Goojprt QR203 thermal printer unable to print non-ASCII chars

What is the purpose of this pull request?

• [ ] Bug fix
• [ ] New Feature
• [x] Documentation update
• [ ] Other

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.72%. Comparing base (d2ab267) to head (a32b561).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #439 +/- ## ======================================== Coverage 94.72% 94.72% ======================================== Files 57 57 Lines 7127 7127 ======================================== Hits 6751 6751 Misses 376 376 ```

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[odudex]

Thank you!