Merge pull request #182 from QuantEcon/update_heavy

Update heavy tailed dist lecture

Author: jstac

lectures/_toc.yml

@@ -19,7 +19,7 @@ parts:
   - file: business_cycle
   - file: inflation_unemployment
   - file: inequality
-  - file: cross_section
+  - file: heavy_tails
 - caption: Useful Tools
   numbered: true
   chapters: