Remove character causing knife cookbook upload to fail.

This mystery character causes knife cookbook upload to fail with ../ruby-1.9.3-p429/gems/chef-11.4.4/lib/chef/cookbook/metadata.rb:444:in `encode\': "\xE2" on US-ASCII (Encoding::InvalidByteSequenceError). Whatever it is gets rolled up when the metadata.rb imports the README.md in the long_description.

Change-Id: I13cd55bee3a98ac0bb0a50abc4e3fef2d61120ba