docs: Update installation instructions with new dataset version and download links

Author: Paulanerus

docs/source/content/installation.md

@@ -11,8 +11,7 @@ You can always obtain the latest release from the following link:
 
 ## Example Data Set
 
-An example data set is available for download at [Zenodo](https://zenodo.org/records/12723324).
-This is Version 3 of the set titled *A Corpus of Biblical Names in the Greek New Testament to Study the Additions, Omissions, and Variations across Different Manuscripts*.
+Download the example data set from [Zenodo](https://zenodo.org/records/15789063). It corresponds to Version 4 of the dataset "A Corpus of Biblical Names in the Greek New Testament to Study the Additions, Omissions, and Variations across Different Manuscripts." To import it, use `GreekVariant4.json`, available on [GitHub](https://github.com/Paulanerus/TextExplorer/blob/master/example/GreekVariant4.json) (for more information, see [Data Import](usage.md)).
 
 Additionally, a plugin for this data set can be downloaded from the [official release page](https://github.com/Paulanerus/TextExplorer/releases/latest) (demo.jar).
 Both plugins and data sets can be loaded directly within the application, as documented [here](usage.md).