Quota: Extend expiry of PercentDiskAvailable2.

Bug: 1165235
Change-Id: I71582edc502c7bdee6b8826c5425de3bf2279d28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2632854
Auto-Submit: Jarryd Goodman <jarrydg@chromium.org>
Commit-Queue: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844763}

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

@@ -174,7 +174,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Quota.PercentDiskAvailable2" units="%"
-    expires_after="2021-02-10">
+    expires_after="2022-01-18">
   <owner>jarrydg@chromium.org</owner>
   <owner>chrome-owp-storage@google.com</owner>
   <summary>