Use https:// instead of git:// URLs in READMEs (#1044)

See rspec/rspec-core#2518.

Author: alyssais

DEV-README.md

@@ -1,6 +1,6 @@
 ## Set up the dev environment
 
-    git clone git://github.com/rspec/rspec-expectations.git
+    git clone https://github.com/rspec/rspec-expectations.git
     cd rspec-expectations
     gem install bundler
     bundle install

README.md

@@ -20,7 +20,7 @@ RSpec repos as well. Add the following to your `Gemfile`:
 
 ```ruby
 %w[rspec-core rspec-expectations rspec-mocks rspec-support].each do |lib|
-  gem lib, :git => "git://github.com/rspec/#{lib}.git", :branch => 'master'
+  gem lib, :git => "https://github.com/rspec/#{lib}.git", :branch => 'master'
 end
 ```