Small copy change

app.py

@@ -193,7 +193,7 @@ consentful = Category(
 sustainable = Category(
     title="🌎 Sustainable",
     description="""
-    These are Spaces that highlight and explore techniques for making machine learning ecologically sustainable.
+    This is work that highlights and explores techniques for making machine learning ecologically sustainable.
     <br><br>
     Examples
     <br><br>