fix(readme): typo in function name

[kruschid]

The readme section above the updated code fragment says that location changes are applied by calling navigate. However, in the code, the function was named setLocation. This PR renames setLocation to navigate in the example for better clarity.
(Generally, I would prefer navigate over setLocation. setLocation could be misunderstood as a state setter, whereas navigate is more specific by pointing out the side effect. This is just an opinion. :-))

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (48b63a9) to head (7c10e8b).
Report is 1 commits behind head on v3.

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  Coverage   100.00%   100.00%           
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[molefrog]

Thanks, good suggestion!