Fixed periodic table pics

README.md

 - [no-gui.png](https://teespring.com/shell-yes)
 - [nutshell.png](https://teespring.com/linux-in-a-nutshell)
 - [penguin-skull.png](https://teespring.com/dsd-penguin-skull-quote)
-- [periodic-table-black.png](https://teespring.com/periodic-table-black)
-- [periodic-table-color.png](https://teespring.com/periodic-table-color)
+- [periodic-table-black.png](https://teespring.com/periodic-table-black-v2)
+- [periodic-table-color.png](https://teespring.com/periodic-table-color-v2)
 - [redpill.png](https://teespring.com/linux-redpill)
 - [respect-linux.png](https://teespring.com/respect-linux)
 - [scream.png](https://teespring.com/tux-scream)