Fix a typo in .readthedocs.yaml

It's doc/conf.py, not docs/conf.py

.readthedocs.yaml

@@ -13,7 +13,7 @@ build:
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
-  configuration: docs/conf.py
+  configuration: doc/conf.py
 
 # We recommend specifying your dependencies to enable reproducible builds:
 # https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html