Enable documentation building in PDF format

Author: aik099

.readthedocs.yaml

@@ -8,6 +8,10 @@ build:
   tools:
     python: "3.12"
 
+# Optionally, build your docs in additional formats such as PDF
+formats:
+  - pdf
+
 # Build documentation in the "docs/" directory with Sphinx
 sphinx:
   configuration: docs/conf.py