[doc] updated environment creation for rtd in order to avoid unexpect…

…ed behavior during build (crash without corresponding error message)

.readthedocs.yaml

@@ -9,25 +9,20 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.11"
-    # You can also specify other tool versions:
-    # nodejs: "19"
-    # rust: "1.64"
-    # golang: "1.19"
-  commands:
-    - pip install .[dev]
 
-# Build documentation in the "docs/" directory with Sphinx
+# install the current packages with the optional dependencies for development. Otherwise some modules would be missing
+python:
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - dev
+
+# Build documentation in the "doc/" directory with Sphinx
 sphinx:
    configuration: doc/src/conf.py
 
 # Optionally build your docs in additional formats such as PDF and ePub
 # formats:
 #    - pdf
 #    - epub
-
-# 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:
-#    - requirements: docs/requirements.txt