Update WebRTC code version (2024-06-28T04:05:47).

Bug: None
Change-Id: I78e975be85a181bb9c6d26c35dd478747a365302
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/355920
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@{#42557}

call/version.cc

diff --git a/call/version.cc b/call/version.cc
index 9e27177..07d899a 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 2024-06-27T04:06:16";
+const char* const kSourceTimestamp = "WebRTC source stamp 2024-06-28T04:05:47";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even