Small typo in README
Small typo in README

The path to make_site.sh is missing an "s" in "scripts".

Change-Id: I7f2957296f1efa44fa26ce2351becb59d1679459
Reviewed-on: http://gerrit.cloudera.org:8080/2686
Reviewed-by: Misty Stanley-Jones <b9f9ef9e00c258208ea831c64cc129eda4ac78b4@apache.org>
Tested-by: Kudu Jenkins

cloudera/kudu,andrwng/kudu,helifu/kudu,EvilMcJerkface/kudu,cloudera/kudu,cloudera/kudu,helifu/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,andrwng/kudu,andrwng/kudu,cloudera/kudu,cloudera/kudu,InspurUSA/kudu,andrwng/kudu,EvilMcJerkface/kudu,helifu/kudu,InspurUSA/kudu,andrwng/kudu,InspurUSA/kudu,helifu/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,InspurUSA/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,cloudera/kudu,helifu/kudu,EvilMcJerkface/kudu,helifu/kudu,andrwng/kudu,helifu/kudu,cloudera/kudu,EvilMcJerkface/kudu,EvilMcJerkface/kudu,cloudera/kudu,andrwng/kudu,helifu/kudu,andrwng/kudu,EvilMcJerkface/kudu,helifu/kudu,andrwng/kudu,cloudera/kudu,InspurUSA/kudu,InspurUSA/kudu