fixed the example in the README file

[ghost]

• updated the imports
• changed api.RegionNorthAmerica to api.RegionEuropeWest in golio.WithRegion(...) because it was causing a runtime exception

[codecov[bot]]

Codecov Report

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

Comparison is base (f8823da) 100.00% compared to head (d9fb3e3) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #58 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 27 27 Lines 955 955 ========================================= Hits 955 955 ```

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[KnutZuidema]

Thanks for the fix @zelena6 🙏🏼