doc: versions aren't pinned

.readthedocs.yml

@@ -4,7 +4,7 @@
 version: 2
 
 build:
-  os: "ubuntu-20.04"
+  os: ubuntu-22.04
   apt_packages:
   - npm
   - plantuml
@@ -18,9 +18,9 @@ build:
     - npm install -g @mermaid-js/[email protected]
 
 # Set requirements to build the docs
-python:
-  install:
-  - requirements: docs/requirements.txt
+# python:
+#   install:
+#   - requirements: docs/requirements.txt
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx: