Update WebRTC code version (2025-01-14T04:08:38).

Bug: None
Change-Id: I3d6215a227854fdb4be70299751e26d3089408e2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/374244
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@{#43727}

call/version.cc

diff --git a/call/version.cc b/call/version.cc
index 93c4d7f..818b7e1 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 2025-01-13T04:05:24";
+const char* const kSourceTimestamp = "WebRTC source stamp 2025-01-14T04:08:38";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even