[i18n review comments] Encoding of text/plain in example (editorial)

[raised by aphillips]

https://www.w3.org/TR/dwbp/#DescriptiveMetadata

In **Example 2**, the media type of the file is given as:

 >       dcat:mediaType "text/csv" ;

The media type should include the charset parameter, e.g. 
"text/csv;charset=UTF-8" since the default for text/* is ASCII and since 
UTF-8 should be preferred.