Update .readthedocs.yaml

Author: vishalanandl177

.readthedocs.yaml

@@ -3,7 +3,8 @@
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 
 # Required
-version: 2
+versions:
+  - master
 
 # Set the OS, Python version and other tools you might need
 build:
@@ -20,13 +21,14 @@ sphinx:
   configuration: docs/conf.py
 
 # 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
 # to build your documentation
 # See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
-# python:
-#    install:
-#    - requirements: docs/requirements.txt
+python:
+    install:
+    - requirements: ./requirements.txt
+    - method: pip