RTD has its own key for PDF generation

earlephilhower · earlephilhower · commit fa22c6c62777 · 2024-12-27T08:48:39.000-08:00
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
@@ -29,8 +29,8 @@ sphinx:
   # fail_on_warning: true
 
 # Optionally build your docs in additional formats such as PDF and ePub
-# formats:
-#   - pdf
+formats:
+  - pdf
 #   - epub
 
 # Optional but recommended, declare the Python requirements required
