Change TOC depth

Just changed the TOC depth from 1 to 2 in the conf.py file to test the GitHub actions workflow.

Author: rclune

docs/conf.py

@@ -57,7 +57,7 @@
 
 # Theme options
 html_theme_options = {
-    "show_nav_level": 1,
+    "show_nav_level": 2,
     "collapse_navigation": False,
     "navigation_depth": -1,  # Unlimited depth
     "globaltoc_collapse": False,