pyproject.toml: Add viz to docs dependencies

EwoutH · web-flow · commit 4a0f71b7da5c · 2024-09-30T08:06:03.000+02:00
To built the visualization tutorial, the viz requirement are needed, so these are added to the docs extra.
diff --git a/pyproject.toml b/pyproject.toml
@@ -70,6 +70,7 @@ examples = [
   "scipy",
 ]
 docs = [
+  "mesa[viz]",
   "sphinx",
   "ipython",
   "pydata_sphinx_theme",
