crostini: Bump histogram expiry for sshfs

We're still using these, bump expiry.

Fixed: b:238141862
Test: CQ
Change-Id: I5d5b77f27c47eca9ce66c7badef7f121968c53f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3812696
Reviewed-by: Timothy Loh <timloh@chromium.org>
Commit-Queue: David Munro <davidmunro@google.com>
Cr-Commit-Position: refs/heads/main@{#1032442}

tools/metrics/histograms/metadata/crostini/histograms.xml

@@ -423,7 +423,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="Crostini.Sshfs.Mount.Result.{Visibility}"
-    enum="CrostiniSshfsResult" expires_after="2022-08-14">
+    enum="CrostiniSshfsResult" expires_after="2023-08-14">
   <owner>davidmunro@google.com</owner>
   <owner>clumptini@google.com</owner>
   <summary>
@@ -442,7 +442,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="Crostini.Sshfs.Mount.TimeTaken" units="ms"
-    expires_after="2022-08-14">
+    expires_after="2023-08-14">
   <owner>davidmunro@google.com</owner>
   <owner>clumptini@google.com</owner>
   <summary>
@@ -452,7 +452,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="Crostini.Sshfs.Unmount.Result" enum="BooleanSuccess"
-    expires_after="2022-12-18">
+    expires_after="2023-08-14">
   <owner>davidmunro@google.com</owner>
   <owner>clumptini@google.com</owner>
   <summary>
@@ -462,7 +462,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="Crostini.Sshfs.Unmount.TimeTaken" units="ms"
-    expires_after="2022-12-18">
+    expires_after="2023-08-14">
   <owner>davidmunro@google.com</owner>
   <owner>clumptini@google.com</owner>
   <summary>