Merge branch '235-add-a-requirement-for-the-python-tools-needed-by-shpinx-2' into '1.4'

Resolve "add a requirement for the python tools needed by shpinx"

See merge request fusiondirectory/user-manual!419

.readthedocs.yaml

@@ -30,6 +30,6 @@ sphinx:
 # Optional but recommended, declare the Python requirements required
 # to build your documentation
 # See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
- python:
-    install:
+python:
+  install:
     - requirements: source/requirements.txt