hw12 release

Author: richardvillagomez

_config.yml

@@ -211,7 +211,7 @@ links:
     hw09: "[Homework 09](https://data8.datahub.berkeley.edu/hub/user-redirect/git-pull?repo=https%3A%2F%2Fgithub.com%2Fdata-8%2Fmaterials-su25&urlpath=tree%2Fmaterials-su25%2Fhw%2Fhw09%2Fhw09.ipynb)"
     hw10: "[Homework 10](https://data8.datahub.berkeley.edu/hub/user-redirect/git-pull?repo=https%3A%2F%2Fgithub.com%2Fdata-8%2Fmaterials-su25&urlpath=tree%2Fmaterials-su25%2Fhw%2Fhw10%2Fhw10.ipynb)"
     hw11: "[Homework 11](https://data8.datahub.berkeley.edu/hub/user-redirect/git-pull?repo=https%3A%2F%2Fgithub.com%2Fdata-8%2Fmaterials-su25&urlpath=tree%2Fmaterials-su25%2Fhw%2Fhw11%2Fhw11.ipynb)"
-    hw12: "Homework 12"
+    hw12: "[Homework 12](https://data8.datahub.berkeley.edu/hub/user-redirect/git-pull?repo=https%3A%2F%2Fgithub.com%2Fdata-8%2Fmaterials-su25&urlpath=tree%2Fmaterials-su25%2Fhw%2Fhw12%2Fhw12.ipynb)"
     hw13: "Homework 13"
   lab:
     lab01: "[Lab 01](https://data8.datahub.berkeley.edu/hub/user-redirect/git-pull?repo=https%3A%2F%2Fgithub.com%2Fdata-8%2Fmaterials-su25&branch=main&urlpath=tree%2Fmaterials-su25%2Flab%2Flab01%2Flab01.ipynb)"