Update build configuration for documentation (#252)

Updated the readthedocs configuration so that it uses...

- the latest available version of `ubuntu`
- the latest available version of `python`

Author: elinscott

.github/workflows/docs.yml

@@ -7,9 +7,9 @@ version: 2
 
 # Specify the python version
 build:
-  os: "ubuntu-22.04"
+  os: "ubuntu-lts-latest"
   tools:
-    python: "3.8"
+    python: "latest"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:

.readthedocs.yml

@@ -62,6 +62,7 @@ docs = [
     "recommonmark>=0.7.1",
     "numpydoc>=1.4.0",
     "sphinx-pyproject>=0.1.0",
+    "myst-parser>=3.0.0",
 ]
 lint = [
     "pylint",