Attempt 002 fixing build readthedocs yaml file

.readthedocs.yaml

@@ -10,16 +10,14 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.12"
-  jobs:
-    install:
-      - requirements: docs/requirements.txt
-      - python.install.method: pip
-      - python.install.path: .
-  sphinx:
-    configuration: docs/source/conf.py
-    formats:
-      - pdf
-      - html 
+
+sphinx:
+  configuration: docs/source/conf.py
+
+formats:
+  - pdf
+  - html
+  - epub
 
 # Build documentation in the docs/ directory with Sphinx
 # sphinx:
@@ -30,9 +28,9 @@ build:
 #    - pdf
 
 # Optionally set the version of Python and requirements required to build your docs
-# python:
-#    install:
-#     - requirements: docs/requirements.txt
+python:
+   install:
+    - requirements: docs/requirements.txt
 #     - method: pip
 #       path: .