update yml

.readthedocs.yml

@@ -1,21 +1,24 @@
-# .readthedocs.yml
+# .readthedocs.yaml
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 
 # Required
 version: 2
 
+# Set the version of Python and other tools you might need
+build:
+  tools:
+    python: "3.8"
+
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
-  configuration: docs/source/conf.py
+   configuration: docs/source/conf.py
 
-# Build documentation with MkDocs
-#mkdocs:
-#  configuration: mkdocs.yml
+# If using Sphinx, optionally build your docs in additional formats such as PDF
+# formats:
+#    - pdf
 
-# Optionally set the version of Python and requirements required to build your docs
+# Optionally declare the Python requirements required to build your docs
 python:
-  version: 3.8
-  install:
-    - requirements: docs/requirements.txt
-a
+   install:
+   - requirements: docs/requirements.txt