Fix to the RTD Documentation Build

.readthedocs.yaml

@@ -9,7 +9,7 @@ version: 2
 build:
   os: ubuntu-20.04
   tools:
-    python: "3.10"
+    python: "3.9"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
@@ -22,4 +22,4 @@ sphinx:
 # Optionally declare the Python requirements required to build your docs
 python:
    install:
-   - requirements: docs/source/requirements.txt
+   - requirements: docs/source/requirements.txt

docs/source/requirements.txt

@@ -1,8 +1,9 @@
 Sphinx==7.2.6
 myst-parser==2.0.0
+astroid==3.3.8
 sphinx-autoapi==3.0.0
 sphinx-rtd-theme==2.0.0
 nbsphinx==0.9.7
 ipykernel==6.30.1
 pandoc==2.4
-sphinxcontrib-mermaid==1.0.0
+sphinxcontrib-mermaid==1.0.0

pyproject.toml

@@ -35,6 +35,7 @@ dynamic = ["version"]
 
 [project.optional-dependencies]
 dev = [
+    "astroid==3.3.8",
     "isort",
     "pytest",
     "pylint",