Updated readthedocs to version 2 config

.readthedocs.yaml

@@ -1,21 +1,18 @@
-# File: .readthedocs.yaml
+version: 2
 
-version: 1
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.8"
 
-# Build from the docs/ directory with Sphinx
+# Build documentation in the docs/ directory with Sphinx
 sphinx:
-  configuration: docs/conf.py
+   configuration: docs/conf.py
 
-# Install mpi
-#build:
-#  apt_packages:
-#    - python3-mpi4py
-#    - libopenmpi-dev
-
-# Explicitly set the version of Python and its requirements
+# Optionally declare the Python requirements required to build your docs
 python:
-  version: 3.7
-  install:
+   install:
+    - requirements: docs/requirements.txt
     - method: pip
-      path: .
-    - requirements: docs/requirements.txt
+      path: .