Fix published date attribute name

app.py

@@ -58,7 +58,7 @@ target_sentiments = st.sidebar.multiselect(
 with st.spinner('📰 Loading articles...'):
     target_articles = load_news(
         rss_feeds.get(target_source)
-    ).sort(key=lambda a: a.pubDate)
+    ).sort(key=lambda a: a.published_parsed)
 
 with st.spinner('⚙️ Analysing articles...'):
     classified_articles = classify_articles(target_articles, pipe)
@@ -85,6 +85,7 @@ for article, sentiment in filter_with_sentiment(classified_articles, target_sent
     st.markdown(
         f'''
         #### {article.title}
+        Published on {article.published_parsed}
         **Sentiment:** {sentiment.get('label').capitalize()}
         '''
     )