Use correct header in last example in README

Author: gahjelle

README.md

@@ -61,5 +61,5 @@ You can also call the Real Python Feed Reader in your own Python code, by import
 
     >>> from reader import feed
     >>> feed.get_titles()
-    ['Splitting, Concatenating, and Joining Strings in Python', ...]
+    ['How to Publish an Open-Source Python Package to PyPI', ...]