Update WebRTC code version (2025-03-18T04:03:58).

Bug: None
Change-Id: I2ba2c7e457f889ebf0e44807047f0e6c95bcc7e3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/381540
Commit-Queue: webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com <webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com>
Bot-Commit: webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com <webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#44145}

call/version.cc

diff --git a/call/version.cc b/call/version.cc
index 2534a44..789c53b 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 2025-03-17T04:06:37";
+const char* const kSourceTimestamp = "WebRTC source stamp 2025-03-18T04:03:57";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even