Update WebRTC code version (2024-06-07T04:04:21).

Bug: None
Change-Id: Ia47bd6bfc0a3530576ff759a5ceaff63cc9e220e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/353762
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@{#42440}

call/version.cc

diff --git a/call/version.cc b/call/version.cc
index e27e67a..1f46fcb 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 2024-06-06T04:06:51";
+const char* const kSourceTimestamp = "WebRTC source stamp 2024-06-07T04:04:21";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even