Update src/display/about.py

Updated text to add details about HHEM v2

src/display/about.py

@@ -23,8 +23,10 @@ TITLE = """<h1 align="center" id="space-title">Hughes Hallucination Evaluation M
 
 # What does your leaderboard evaluate?
 INTRODUCTION_TEXT = """
-This leaderboard (by [Vectara](https://vectara.com)) evaluates how often an LLM introduces hallucinations when summarizing a document. 
-
+This leaderboard (by [Vectara](https://vectara.com)) evaluates how often an LLM introduces hallucinations when summarizing a document. <br>
+THe leaderboard utilizes [HHEM](https://huggingface.co/vectara/hallucination_evaluation_model), an open source hallucination detection model. 
+An improved version (HHEM v2), which supports more languages, is a calibrated score, and supports longer text sequences, is integrated into 
+the [Vectara platform](https://console.vectara.com/signup/?utm_source=huggingface&utm_medium=space&utm_term=integration&utm_content=console&utm_campaign=huggingface-space-integration-console).
 
 """