Extend Net.Radio.PossibleWakeupTrigger.* histograms

We may still analyze these histograms in the near future.

Bug: 1355376
Change-Id: I2f541c55233cfac0197e2311adacc216fd15ed82
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3920430
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Commit-Queue: Kenichi Ishibashi <bashi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1051579}

tools/metrics/histograms/metadata/net/histograms.xml

@@ -4268,7 +4268,7 @@ chromium-metrics-reviews@google.com.
 
 <histogram
     name="Net.Radio.PossibleWakeupTrigger.{ProtocolType}WriteAnnotationId"
-    enum="TrafficAnnotationUniqueIdHash" expires_after="2022-10-01">
+    enum="TrafficAnnotationUniqueIdHash" expires_after="2023-01-01">
   <owner>bashi@chromium.org</owner>
   <owner>blink-network-stack@google.com</owner>
   <summary>