Update WebRTC code version (2024-02-06T04:02:15).

Bug: None
Change-Id: I8e652b68f1163cbf8c447d4181c73d11510a5b63
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/338141
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@{#41674}

call/version.cc

diff --git a/call/version.cc b/call/version.cc
index d0c62b7..149af50 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 2024-02-04T04:03:09";
+const char* const kSourceTimestamp = "WebRTC source stamp 2024-02-06T04:02:15";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even