Update expiry date for V8 Turbofan histogram

This CL updates the expiry date and owners list of
V8.TurboFanOptimizeNonConcurrentTotalTime to match the rest of the
V8.TurboFan* group.

Bug: chromium:1149511
Change-Id: I8ade45123a24a7afac7b90982b0635eea1f61418
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2606359Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841992}

tools/metrics/histograms/histograms_xml/v8/histograms.xml

@@ -916,8 +916,9 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="V8.TurboFanOptimizeNonConcurrentTotalTime"
-    units="microseconds" expires_after="2020-12-31">
-  <owner>bmeurer@chromium.org</owner>
+    units="microseconds" expires_after="2021-05-09">
+  <owner>neis@chromium.org</owner>
+  <owner>mvstanton@chromium.org</owner>
   <owner>mslekova@chromium.org</owner>
   <summary>
     Total time from starting optimizing to installing the code object. Recorded