[Docs] Update version in docs

Author: vkorukanti

docs/source/conf.py

@@ -36,8 +36,8 @@
 project = 'Delta Lake'
 author = 'Delta Lake Authors'
 
-version = '3.0.0'   # Replaced by copybara
-release = '3.0.0'
+version = '3.1.0'   # Replaced by copybara
+release = '3.1.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.