Update previous publication date.
--- a/spec/latest/json-ld-api/index.html	Wed Jan 11 16:26:56 2012 -0800
+++ b/spec/latest/json-ld-api/index.html	Wed Jan 11 16:36:47 2012 -0800
@@ -163,7 +163,7 @@
           // and its maturity status
           previousPublishDate:  "2011-10-23",
           previousMaturity:     "ED",
-          previousDiffURI:      "http://json-ld.org/spec/ED/json-ld-api/20111016/index.html",
+          previousDiffURI:      "http://json-ld.org/spec/ED/json-ld-api/20111023/index.html",
           diffTool:             "http://www.aptest.com/standards/htmldiff/htmldiff.pl",
 
           // if there a publicly available Editor's Draft, this is the link
--- a/spec/latest/json-ld-syntax/index.html	Wed Jan 11 16:26:56 2012 -0800
+++ b/spec/latest/json-ld-syntax/index.html	Wed Jan 11 16:36:47 2012 -0800
@@ -163,7 +163,7 @@
           // and its maturity status
           previousPublishDate:  "2011-10-23",
           previousMaturity:     "ED",
-          previousDiffURI:      "http://json-ld.org/spec/ED/json-ld-syntax/20111016/index.html",
+          previousDiffURI:      "http://json-ld.org/spec/ED/json-ld-syntax/20111023/index.html",
           diffTool:             "http://www.aptest.com/standards/htmldiff/htmldiff.pl",
 
           // if there a publicly available Editor's Draft, this is the link