Update version to Pre-Release v2.3
Update version to Pre-Release v2.3

pascalberger/docfx,LordZoltan/docfx,LordZoltan/docfx,928PJY/docfx,superyyrrzz/docfx,superyyrrzz/docfx,hellosnow/docfx,hellosnow/docfx,dotnet/docfx,LordZoltan/docfx,DuncanmaMSFT/docfx,pascalberger/docfx,superyyrrzz/docfx,928PJY/docfx,928PJY/docfx,LordZoltan/docfx,DuncanmaMSFT/docfx,hellosnow/docfx,dotnet/docfx,dotnet/docfx,pascalberger/docfx