Fix typos.

.readthedocs.yaml

@@ -13,7 +13,7 @@ build:
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
-   configuration: docs/source/conf.py
+   configuration: doc/source/conf.py
 
 # If using Sphinx, optionally build your docs in additional formats such as PDF
 # formats:
@@ -22,4 +22,4 @@ sphinx:
 # Optionally declare the Python requirements required to build your docs
 python:
    install:
-   - requirements: docs/requirements.txt
+   - requirements: doc/requirements.txt