Update blogger.markdown

In line #665, added this new line, "If redirect_to_article_path(@article) does not not work, try redirect_to(@article)." redirect_to_article_path(@article) didn't work on my machine. I am guessing this command works based on Ruby version. I have this version: ruby 2.0.0p481 (2014-05-08 revision 45883) [universal.x86_64-darwin13]. I was getting the error message that the command does not exist. But, changing the command to redirect_to(@article) worked.