add banner to demo (#9)

- add banner to demo (e4025d4c2b2f3e4b5d2e04df11f6eb5465151b7a)

app.py

@@ -72,12 +72,15 @@ def translate(text: str, src_lang: str, tgt_lang: str):
 
 
 description = """
-# UNESCO Language Translator, powered by Meta and Hugging Face
+<div style="text-align: center;">
+    <img src="https://huggingface.co/spaces/UNESCO/nllb/resolve/main/UNESCO_META_HF_BANNER.png" alt="UNESCO Meta Hugging Face Banner" style="max-width: 800px; width: 100%; margin: 0 auto;">
+    <h1 style="color: #0077be;">UNESCO Language Translator, powered by Meta and Hugging Face</h1>
+</div>
 
 UNESCO, Meta, and Hugging Face have come together to create an accessible, high-quality translation experience in 200 languages. 
 
-This is made possible through an open approach to AI innovation using Meta's open-sourced No Language Left Behind (NLLB) AI model, hosted on Hugging Face Spaces. """
-
+This is made possible through an open approach to AI innovation using Meta's open-sourced No Language Left Behind (NLLB) AI model, hosted on Hugging Face Spaces.
+"""
 disclaimer = """
 ## Disclaimer