Update README to specify project URL

Clarified the description of the project in the README.

Author: m-aciek

README.md

@@ -1,7 +1,7 @@
 ![website status](https://img.shields.io/website?url=https%3A%2F%2Ftranslations.python.org&logoColor=yellow&label=website%20status)
 [![lint](https://github.com/python-docs-translations/dashboard/actions/workflows/lint.yml/badge.svg)](https://github.com/python-docs-translations/dashboard/actions/workflows/lint.yml)
 
-This project generates a dashboard presenting the Python documentation translations projects.
+This project generates a dashboard presenting the Python documentation translations projects available at translations.python.org.
 
 There are two entrypoints:
 - `generate.py`: Generates dashboard HTML and JSON files.