[MINOR] Update 0.10.0 release notes link on Download page
[MINOR] Update 0.10.0 release notes link on Download page

objectadjective/incubator-systemml-website,gweidner/systemml-website,gweidner/systemml-website,objectadjective/incubator-systemml-website,apache/incubator-systemml-website,apache/incubator-systemml-website