fix: add documentation for using chartoptions to set language translations (#4691) (CP: main)

[vaadin-bot]

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AI Language Review

The provided content contains the following suggested edits:

1. In the section "Setting a specific options class for a series makes that series render as that type of chart," the mention of [classname]PlotOptionsSpineshould be corrected to[classname]PlotOptionsSpline.

2. Add a description for the new "Chart Language" section under the file Chart Configuration, explaining its purpose and content to ensure clarity for the reader.

3. Instead of "This allows to create <<basic-use#charts.basic-use.mixed, mixed type charts>>," the sentence should be "This allows you to create <<basic-use#charts.basic-use.mixed, mixed type charts>>" to improve readability and maintain consistent tense usage.

These corrections will enhance the accuracy, clarity, and grammatical consistency of the documentation.