Add Octokit::BranchNotProtected for relevent 404
Add Octokit::BranchNotProtected for relevent 404

JuanitoFatas/octokit.rb,pvdb/octokit.rb,pvdb/octokit.rb,benbalter/octokit.rb,LizzHale/octokit.rb,benbalter/octokit.rb,JuanitoFatas/octokit.rb,octokit/octokit.rb,octokit/octokit.rb,LizzHale/octokit.rb