README: Improve description and add link to Tesseract wiki

Signed-off-by: Stefan Weil <[email protected]>

Author: stweil

README.md

@@ -1,7 +1,9 @@
 # tessdata_best – Best (most accurate) trained models
 
-This repository contains language data for the
+This repository contains the best trained models for the
 [Tesseract Open Source OCR Engine](https://github.com/tesseract-ocr/tesseract).
+See the [Tesseract wiki](https://github.com/tesseract-ocr/tesseract/wiki/Data-Files)
+for additional information.
 
 All data in the repository are licensed under the
 Apache-2.0 License, see file [COPYING](COPYING).