Update app.py

Improve wording

app.py

@@ -83,14 +83,16 @@ with gr.Blocks(title="OCR QA Demo") as demo:
     
     gr.Markdown(
         """
-        # 🔍 OCR Quality Assessment Pipeline Demo
-        
-        **OCR Quality Assessment** demonstrates how text extracted from OCR (Optical Character Recognition) 
-        is analyzed in the **Impresso** project. This pipeline identifies OCR errors and
-        assesses text quality, returning a score from 0.0 to 1.0.
-        
-        Try the example below (German text with typical OCR errors) or enter your own OCR text to see how it gets processed!
-        """
+    # 🔍 OCR Quality Assessment Demo
+
+    This demo showcases the **OCR Quality Assessment (OCRQA)** pipeline developed as part of the [Impresso Project](https://impresso-project.ch). The pipeline evaluates the quality of text extracted via **Optical Character Recognition (OCR)** by estimating the proportion of recognizable words.
+
+    It returns:
+    - a **quality score** between **0.0 (poor)** and **1.0 (excellent)**, and
+    - a list of **potential OCR errors** (unrecognized tokens).
+
+    You can try the example below (a German text containing typical OCR errors), or paste your own OCR-processed text to assess its quality.
+    """
     )
     
     with gr.Row():