Update talks.py

Corrected the date conditional in the talks.py generator

Author: shivamtawari

markdown_generator/talks.py

@@ -83,7 +83,7 @@ def html_escape(text):
     if len(str(item.venue)) > 3:
         md += 'venue: "' + item.venue + '"\n'
 
-    if len(str(item.location)) > 3:
+    if len(str(item.date)) > 3:
         md += "date: " + str(item.date) + "\n"
 
     if len(str(item.location)) > 3: