Updated PR template to include documentation link.

Signed-off-by: Leander Stephen D'Souza <[email protected]>

Author: leander-dsouza

.github/PULL_REQUEST_TEMPLATE.md

@@ -7,6 +7,7 @@
 | Info | Please fill out this column |
 | ------ | ----------- |
 | Ticket(s) this addresses   | (add tickets here #1) |
+| Documentation | (link to docs PR, pending, or N/A) | <!-- New features, parameter changes, and default value changes must be documented -->
 | Primary OS tested on | (Ubuntu, MacOS, Windows) |
 | Robotic platform tested on | (Steve's Robot, gazebo simulation of Tally, hardware turtlebot) |
 | Does this PR contain AI generated software? | (No; Yes and it is marked inline in the code) |