fix(docs): add now mandatory config file, fixes #813

.readthedocs.yaml

@@ -0,0 +1,10 @@
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+# Build documentation in the "docs/" directory with Sphinx
+sphinx:
+  configuration: docs/conf.py