update gem.homepage

qiniu-rs.gemspec

@@ -7,7 +7,7 @@ Gem::Specification.new do |gem|
   gem.email         = ["why404@gmail.com"]
   gem.description   = %q{Qiniu Resource (Cloud) Storage SDK for Ruby. See: http://docs.qiniutek.com/v2/sdk/ruby/}
   gem.summary       = %q{Qiniu Resource (Cloud) Storage SDK for Ruby}
-  gem.homepage      = "https://github.com/why404/qiniu-rs"
+  gem.homepage      = "https://github.com/qiniu/ruby-sdk"
 
   gem.files         = `git ls-files`.split($\)
   gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }