Make elastic-recheck web page mention 10 days not 14

In I4e47ece38e68d4ee19ee61b9a107bba9f12abf8c we began the process to
make elastic-recheck reflect the fact that our Elastic Search index is
only now 10 days. This patch finishes up those changes.

Change-Id: I6df756f7c1a90b059487c7504443a70b7d3b7f35
Merge "Make elastic-recheck web page mention 10 days not 14"