Update SmartDim UMA metrics expiry dates

Bug: 1365463,1365464
Change-Id: Ic2e744292a469c833b7a80d49437c7c7c5d77439
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3905452
Reviewed-by: Tony Yeoman <tby@chromium.org>
Commit-Queue: Thanh Nguyen <thanhdng@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1049474}
diff --git a/tools/metrics/histograms/metadata/power/histograms.xml b/tools/metrics/histograms/metadata/power/histograms.xml
index 3bad929b..89469128 100644
--- a/tools/metrics/histograms/metadata/power/histograms.xml
+++ b/tools/metrics/histograms/metadata/power/histograms.xml
@@ -2186,7 +2186,7 @@
 </histogram>
 
 <histogram name="PowerML.SmartDimModel.Result"
-    enum="PowerMLSmartDimModelResult" expires_after="2022-11-01">
+    enum="PowerMLSmartDimModelResult" expires_after="2023-09-20">
   <owner>napper@chromium.org</owner>
   <owner>thanhdng@chromium.org</owner>
   <summary>
@@ -2199,7 +2199,7 @@
 </histogram>
 
 <histogram name="PowerML.SmartDimParameter.Result"
-    enum="PowerMLSmartDimParameterResult" expires_after="2022-11-01">
+    enum="PowerMLSmartDimParameterResult" expires_after="2023-09-20">
   <owner>napper@chromium.org</owner>
   <owner>thanhdng@chromium.org</owner>
   <summary>