Allow warnings in documentation

"Temporary" (hopefully) workaround for gh-2453.

Signed-off-by: Juan Luis Cano Rodríguez <[email protected]>

.readthedocs.yml

@@ -22,7 +22,7 @@ build:
 sphinx:
   builder: html
   configuration: docs/conf.py
-  fail_on_warning: true
+  fail_on_warning: false  # Turn back on soon
 
 # Build documentation with MkDocs
 # mkdocs: