Update and rename .readthedocs.yml to .readthedocs.yaml

seguite le istruzioni:
https://docs.readthedocs.io/en/stable/config-file/v2.html#configuration-file-v2-readthedocs-yaml

.readthedocs.yml → .readthedocs.yaml

@@ -5,19 +5,30 @@
 # Required
 version: 2
 
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+    # You can also specify other tool versions:
+    # nodejs: "20"
+    # rust: "1.70"
+    # golang: "1.20"
+
+
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: docs/conf.py
 
 # Build documentation with MkDocs
-#mkdocs:
+# mkdocs:
 #  configuration: mkdocs.yml
 
 # Optionally build your docs in additional formats such as PDF and ePub
 formats: all
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.7
+  # version: 3.7
   install:
     - requirements: docs/requirements.txt