Update WebRTC code version (2026-04-23T04:10:25).

Bug: None
Change-Id: I7b9cf19a33300cc6dd1ff5e5d1aa63504529db63
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/466261
Bot-Commit: webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com <webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com>
Commit-Queue: webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com <webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#47533}

call/version.cc

diff --git a/call/version.cc b/call/version.cc
index cf6e99b..f8d2472 100644
--- a/call/version.cc
+++ b/call/version.cc
@@ -13,7 +13,7 @@
 namespace webrtc {
 
 // The timestamp is always in UTC.
-const char* const kSourceTimestamp = "WebRTC source stamp 2026-04-22T04:11:07";
+const char* const kSourceTimestamp = "WebRTC source stamp 2026-04-23T04:10:25";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even