Update .readthedocs.yaml

Author: dongwook-chan

.readthedocs.yaml

@@ -2,7 +2,7 @@
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 
 # Required
-version: 2
+version: 1
 
 # Set the OS, Python version and other tools you might need
 build:
@@ -32,4 +32,4 @@ sphinx:
 # See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
 # python:
 # install:
-# - requirements: docs/requirements.txt
+# - requirements: docs/requirements.txt