Docs: enable strict mode

Signed-off-by: Adam J. Stewart <ajstewart426@gmail.com>

Author: adamjstewart

.readthedocs.yaml

@@ -13,6 +13,7 @@ build:
 # Build documentation in the "docs/" directory with Sphinx
 sphinx:
   configuration: docs/conf.py
+  fail_on_warning: true
 
 # Optional but recommended, declare the Python requirements required
 # to build your documentation