Quota: Extend expiry of DiskspaceShortage histogram.

Bug: 1165232
Change-Id: I6849113b9988536a2742f17d9f0da13b68d58ed9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2632778Reviewed-by: Caitlin Fischer <caitlinfischer@google.com>
Commit-Queue: Jarryd Goodman <jarrydg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844630}

tools/metrics/histograms/histograms_xml/quota/histograms.xml

@@ -71,8 +71,9 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   </summary>
 </histogram>
 
-<histogram name="Quota.DiskspaceShortage" units="MB" expires_after="2021-02-14">
+<histogram name="Quota.DiskspaceShortage" units="MB" expires_after="2022-01-18">
   <owner>jarrydg@chromium.org</owner>
+  <owner>chrome-owp-storage@google.com</owner>
   <summary>
     Difference between acceptable lower limit of diskspace and actual free
     diskspace at beginning of an eviction round.