Update WebRTC code version (2024-05-15T04:05:57).

Bug: None
Change-Id: I80f53bde21844cc50bb93f0a5863f4fcf538ce36
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/350582
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@{#42305}
diff --git a/call/version.cc b/call/version.cc
index 737065e..5a4f1c4 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 2024-05-14T04:05:39";
+const char* const kSourceTimestamp = "WebRTC source stamp 2024-05-15T04:05:57";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even